Hallucinations?

I haven't taken any drugs or anything in years. But it always happens, I have weird hallucinations, not just visually, auditory sometimes, my friends always think I should see a shrink because for simple things they say I freak out and I'm too paranoid and crap. I'm afraid of crowds, not afraid, but extremely uncomfortable. Hell, my whole life I've actually been screwed up. By this, can anyone give a suggestion what it is until i do go to a therapist?