Don't be too eager, Eager. If you've been taking 50mg. Zoloft for a long while, it's going to take longer than three days to get that shit out of your system.
You will need at least two weeks clean from that shit for it not to have an effect on your ceremony, a month's be better though.
I'm not say you should go off your meds, just that if you do go off, at least make it worthwhile.
Personally, I think SSRI's do more harm than good, I've taken several types and they ALL sucked for me.
A little MXE and some tryptamines once in a while work wonders for depression....for me.