I'm pretty similar. I suspect I have mild OCD, anxiety, hypochondria, paranoia. My problems subside when I'm pleasantly busy and working out regularly. The only time washing my hands too much is a problem is winter - they get more dried out so I have to use a lot of lotion. Then I have to make sure not to put my hands in the tank with lotion on them. I've been germ-phobic since I learned about them in elementary school : P
If you enjoy the hobby and it doesn't bother you excessively, don't worry too much about it (although getting a professional diagnosis isn't a bad idea - must admit I've never had one). I wash my hands after putting them in tank water (sometimes more than once within a few minutes), and save my daily shower for after tank maintenance (done on weekends). It doesn't really cause any major problems for me, and I still enjoy the hobby. In fact, I find gazing into my tanks very soothing, and sometimes use it as a stress reducer.
If you enjoy the hobby and it doesn't bother you excessively, don't worry too much about it (although getting a professional diagnosis isn't a bad idea - must admit I've never had one). I wash my hands after putting them in tank water (sometimes more than once within a few minutes), and save my daily shower for after tank maintenance (done on weekends). It doesn't really cause any major problems for me, and I still enjoy the hobby. In fact, I find gazing into my tanks very soothing, and sometimes use it as a stress reducer.