It’s been many many years that I went off of Zoloft so I don’t remember specifics. But coming off of Pristiq I had the same effects as you. The brain zaps were terrible and I just felt like shit. I was already on probs 40mg of Prozac (and also Wellbutrin) before I stopped the Pristiq completely, so I had meds still in me for sure. But for me, crappy feeling/zaps subsided completely after about 3-4 weeks. And since being on Prozac, I haven’t experienced any brain zaps or headaches at all, even when I’m late for my meds. But with Zoloft and Pristiq I had them any time I was late by even just a few hours. I just made my way up to 80mg, my final stopping dosage of Prozac, and it is perfect! I’ve been on a ton of different antidepressants before and Prozac has by far been the best. I consider Prozac and Vyvanse (for ADHD) to be life altering miracle drugs. As far as remedies, I found taking meclizine helpful with the brain zaps and head stuff. It’s and antihistamine but is also prescribed for dizziness/vertigo which is why I think it works. Also, peppermint helped (my) headache and stomach upset. Also, rest and quietness. I hope Prozac changes your life too! Good luck!