Does anyone have experience with weaning off antidepressants/anti-anxiety meds?

I'm currently weaning off Effexor after being on it for about 6 months for some acute anxiety stuff. My doctor advised that I discontinue it since we're TTC. I was taking 75mg, then stepped down to 37.5 for a week, then every other day, now I'm off completely. It's been 3 days, and holy cow are the side effects miserable . Dizziness, nausea, fatigue, brain zaps if I move my eyes too quickly.

Any advice on how long this will last?? It's terrible!