When I was college, I was diagnosed with OCD.
I am sorry to hear that. Which thoughts were you unable to  for more than a short period of time.
I had to study for test but kept thinking about trivial stuff like desk space. So I couldn't concentrate. 
What are the things you were doing at that time.  hand washing, counting of things, or checking to see if a door is locked?
Yes all that stuff. I realized that I couldn't focus on my studies so I got both angry and upset. 
I know the struggle which cause most activities of your daily life to be negatively affected.
That is correct but on the flip side I am doing better now. I went to the doctor and am taking medication. 
Of course you should do that. They need to know your symptoms then they requires ruling out other drug related or medical causes.