Hi and welcome to the forum
Your last post could have been written about me (other than the constant hand washing). I've actually been struggling a bit myself recently with my PhD course and anxiety issues (I've self diagnosed myself with agoraphobia as it's much worse when I go out). I've seen my GP and mentioned that I've recently been a bit more obsessive than usual. I used to get really obsessive as a child, lining my toys up in a certain way and counting things (e.g. the number of letters in each word when reading books, then say the title of the book out loud etc.) I've always had to check certain things; e.g. when I go to bed I check that my door is locked, my radiator is off (even if I haven't turned it on all day!), my bathroom light is off and the taps aren't running. The weird thing is, I have an onsuite bathroom so if the light is on I'd know because my bedroom would be light! I deal with this by trying to force myself not to check things more than once. When I check things I also say silently in my head that the light is off, the door is locked etc. The urge to check is like an itch that just wants to be scratched, but the problem is the more times you scratch it the worse it gets! So I try and only do it once, although this can be difficult.
I also bite my nails badly and get obsessed with getting to place on time (although I've heard people with OCD may be late for things due to checking etc., with me the need to get to places on time overrides this). I check my watch all the time for the hour or so before meetings. I check unimportant emails and sometimes will delete whole sentences then write them again without knowing why. I also sometimes get the urge to touch objects and pace up and down for no reason. I have horrible thoughts sometimes as well, like people in my family dying and how I'd cope with it if they did. I know people don't reccommend doing this but I just try to put them to the back of my mind, although this can be difficult, particularly at night. Anyway, the GP said it sounded like it could be OCD from what I was saying... although I thought it couldn't be because I don't do the stereotypical hand washing.
I think if you're at all worried, I'd recommend seeing your GP with a list of the OCD type symptomes you experience or a counsellor. I've heard cognitive behavioural therapy (CBT) can work well too.