Well, I have a few but I think they're best summed up under a larger phobia: agoraphobia.
From Wikipedia:
Not to be confused with agraphobia, agoraphobia is a condition where the sufferer becomes anxious in environments that are unfamiliar or where he or she perceives that they have little control. Triggers for this anxiety may include wide open spaces, crowds (social anxiety), or traveling (even short distances). Agoraphobia is often, but not always, compounded by a fear of social embarrassment, as the agoraphobic fears the onset of a panic attack and appearing distraught in public. This is also sometimes called 'social agoraphobia' which may be a type of social anxiety disorder also sometimes called "social phobia".
Not all agoraphobia is social in nature, however. Some agoraphobics have a fear of open spaces. Agoraphobia is also a defined as "a fear, sometimes terrifying, by those who have experienced one or more panic attacks". In these cases, the sufferer is fearful of a particular place because they have experienced a panic attack at the same location in a previous time. Fearing the onset of another panic attack, the sufferer is fearful or even avoids the location. Some refuse to leave their home even in medical emergencies because the fear of being outside of their comfort area is too great.
The sufferer can sometimes go to great lengths to avoid the locations where they have experienced the onset of a panic attack. Agoraphobia, as described in this manner, is actually a symptom professionals check for when making a diagnosis of panic disorder. Other syndromes like obsessive compulsive disorder or post traumatic stress disorder can also cause agoraphobia, basically any irrational fear that keeps one from going outside can cause the syndrome.[7]
It is not uncommon for agoraphobics to also suffer from temporary separation anxiety disorder when certain other individuals of the household depart from the residence temporarily, such as a parent or spouse, or when the agoraphobic is left home alone. Such temporary conditions can result in an increase in anxiety or a panic attack.
I also have some OCD stuff I do. I always double-tap my caps lock key in between sentences. That's probably pretty benign though. I do know that if I'm under a lot of stress, or extremely upset, I start looking at numbers and trying to make them "even" in my head. For instance, if I see the number 345 then I would mentally add 655 to it in my head to make it 1000. I rarely do stuff like that anymore, but it's a way for my mind to avoid focusing on the things that I don't want to think about. ^^;
I've also had a nervous tic type thing that I've done for many, many years. It's pretty subtle but I am sort of self-conscious about it. ^^ I do a slight double-head nod really quickly. My head probably doesn't move more than a cm when I do it, though. ^^; Most people claim they never notice it.
I'm working on improving. Compared to where I was 6 years ago, I've made a lot of progress. It's still not where I want to be, though. There was a program called "Attacking Anxiety and Depression" (you may have seen or heard it advertised) that helped me a lot. Each audio tape consists of a lesson, then a 30 minute roundtable discussion with a few people that did the program and share their experiences with things in that chapter. For one thing, just knowing that I'm not the only one that worried about certain types of things was a relief. ^^;
I also like Tony Robbins. ahehe. ^^
My whole anxiety issue started when I was 9. I got the wind knocked out of me and was having trouble breathing for the next day. Then within a day or so of this happening, I had a sore throat so I took some Chloraseptic spray. I immediately started to think I was choking. In fact, I seriously ate almost no food for almost 10 days because I was so absolutely scared I would choke.
I used to a bit of a hypochondriac myself, too. I was very worried about cross contamination and germs for awhile. ^^; Like, really bad. I would wash my hands so much. I realized I was more or less over that when I was able to throw disgusting rotten produce down the filthy garbage chute where I worked, and then have someone hand me a piece of food a few minutes later and not have to immediately run and wash my hands first. A good idea? Probably. But I was no longer so super worried about it.
Also used to be super worried that someone would mess with my food or try to poison me. I used to look at my food very closely before I ate it, even if I bought it from the store. If I bought something and I felt for whatever reason it wasn't sufficiently sealed, I wouldn't eat it.
Again, like I said, I've improved a lot since then so most of this stuff isn't really an issue anymore. Still have other stuff to conquer, though. ^^
Not really sure if what I'm adding is helpful to you (although I recommend checking out the "Attacking Anxiety and Depression" program, even if you just research it online), but I hope you're able to overcome this.
(Sorry if this post is sporadic and all over the place. I kept remembering stuff to add and couldn't always find the best place to include it.)