non-compliance

I only had half a dose of Celexa left on Thursday, but I forgot to pick up the new prescription. I forgot again yesterday, and today, so now I won't have any until Tuesday. I wonder if I could just stop taking it and thus avoid going back to the psychiatrist again...
I never like taking meds because either they have no effect at all, or I notice some slight improvement, but am still convinced it's due to other factors, so I want to stop taking them to test that hypothesis. I haven't given in to the urge to experiment before. The previous times I've thought I noticed a change, it didn't seem to last long, anyway. I have just stopped taking whatever I was on the past two summers, mainly because students in my department get a medical allowance during the school year, but I resent paying for meds myself when they aren't doing anything. Otherwise, the path of least resistance is just to take the things. It's easier to feel okay when it's warm and sunny, anyway. Maybe I should try a SAD lamp. If only they sold those at the campus pharmacy...