Should I seek CBT (Cognitive Behavioral Therapy) for OCD?

I've been dealing with these huge irrational doubts lately (well, I've been having a hard time determining that, too). I've been gradually taking steps to conquer the fears and doubts little by little. But then sometimes I doubt that I conquered my fear, or I didn't think things through enough, or I just plain forget what happened. Then I have to start over if I can. These anxieties have been stripping me of my personality and consuming my thought life, but I feel like maybe I am on the brink of defeating them - thinking everything through properly to where I will have no need to worry anymore. But right now, all these thoughts are just swirling around and I have no idea what to do; all I know is, I'm worried. Things have gotten a lot better, though, over the past week. I'm wondering if I can conquer this demon myself or if I need professional guidance. These doubts and fears aren't a regular thing with me, I have good periods and bad periods. This happens to be a bad period.