Do I have a problem? If I do what sort of problem is this?

I obcess over things. if I get in my head i have to do something or get something i go to great leanth to get it or do it. I make it my life mission to do that thing. After one obssation is over I am onto the next one. Once I was trying to loose some waight by dieting it got to a point where it turned into food disorder. when it was over couple of years later it was something else. It goes on and on. Is this OCD or something else. What do you guys think?
Do I have a problem? If I do what sort of problem is this?
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