Since I see that this is your first post to these forums, I'd like to welcome you to Psych Central. I hope that you'll find this site to be a helpful source of support and information, and I'd like to encourage you to continue to use this site, if you think that doing so is something that you'd likely benefit from.

I can't diagnose you, but I think that you're probably onto something in basically saying that some of the symptoms that you've described seem to be line with the obsessive symptoms that those with OCD experience, even if you don't have any compulsions that are of any significance. And this isn't intended to have any diagnostic value either, but to me, it looks like some of the mood-related problems that you've described might possibly be part of what's sometimes called atypical depression, which is basically a pattern of depressive symptoms that typically involves having a reactive mood, along with symptoms that might include oversleeping, overeating, a heavy "leaden" feeling, and interpersonal rejection sensitivity. You might want to try looking for some more information about atypical depression (which can present itself both in bipolar disorder and in "unipolar" depressive disorders such as major depressive disorder and persistent depressive disorder) to see if this presentation of depressive symptoms might look like one possible explanation for at least some of the symptoms that you're experiencing. As you might already understand, though, you'd need to visit a qualified mental health professional to get a more authoritative opinion on the issue of what might explain your symptoms from a diagnostic perspective.

Whether you decide to visit a therapist, a psychiatrist, or some other sort of mental health professional first, I'd recommend seeing someone who you think you'd likely end up being comfortable with. If you end up seeing a therapist first, the therapist should be able to refer you to a psychiatrist if you want to see one, and I think that a psychiatrist should also be able to refer you to a therapist if your first visit to a mental health professional ends up being to a psychiatrist. But regardless as to what your first step might be as far as seeking professional help is concerned, I wish you luck in your pursuit of improved mental health. Take care.