<---advice from actual medical guy
If it interferes with your ability to function normally in work, school, or personal life.....MAYBE worth checking out.
If it doesnt interfere with anything -- i.e. you get test papers done in the time allowed, you only leave the house once in AM without needing to recheck anything, etc -- then you only have tendencies.
Research seems to show that OCD is caused by an extremely powerful "error check" pathway in some people's brains, so that no matter how many times they reassure themselves they HAVE TO double check that the oven's turned off, or whatever.
There's a big spectrum for error check tendencies, and its not "abnormal" if you're careful, or focus intensely on a task or pastime.
Honestly...do you want an accountant or lawyer or doctor who's favorite phrase is "Yeah, whatever"?
I dont think you have a problem from what you say! Relax....and chose tasks that take advantage of attention to detail, etc because they may come naturally to you.