what are the signs that your dose is too high?

I started sertraline in January on 50mg, found it helped for a few weeks but then took a sharp decline back to how i felt before i was on it. i had my dose upped to 100mg nearly a month ago and it’s so bad, i feel almost more depressed than i was before i started. pretty constant paranoia, and i just feel completely dulled. i’ve had issues with derealisation before and it feels like that but x20. i know these could just be teething problems since i haven’t been on my higher dose for long and i had bad side effects when i first started it, but i’ve been concerned by just how rough i feel and im wondering if i should ask to be on a lower dose?