Well, think about it. This is your mental health we're talking about here. You have a problem, a "thought infection", and you don't know how to fix it yourself. That's why you're looking for a professional who should know.
As with any medical professional, there's red tape and bureaucracy involved. Now, if you had a cut that was festering, you'd go see someone about getting it fixed. You wouldn't be as likely to consider just going home and letting it work itself out. This is because we have, for whatever reason, a different perspective of mental health than we do of the other medical branches.
Admit to yourself (you don't need to admit it to anyone else) that you have an issue that needs to be fixed. Then get help on fixing it. Because if you don't, it can fester, it can break you down, and it can kill you.
And "help" doesn't mean getting yourself locked in a mental ward with five different colors of brain-away you have to choke down every morning and afternoon. Just talking to someone; a sympathetic soul who can provide a different, hopefully educated perspective on things you yourself have thought about, will help immensely. Yes, it is a bother to find the right one, but it's worth it.