I did it!

I was assertive, which wasn't hard because my pdoc is very nice. At least he was today! He said to take a break and to call him if I want to try something else. He said I apparently don't react to seritonin, and said there are 2 other neurotransmitters. I'm not sure what he said they are, but he said Wellbutrin is somthing I could try, and the other one I never heard of.
He said I cold just stop the zoloft without tapering. I questioned that, so if I want to do it gradually, I can but he doesn't think I'll get brain zaps or anything by stopping it all at once. Does anyone have experiencing going off 50 mg. of zoloft? I was only on that dose for 2 weeks, but for about 2 months went from 25 mg. gradually up to the 50. Thanks!
I may just NOT try anything else. I don't like the way the zoloft made me feel.