Brainfog 3 months after quitting Effexor

Hey,

I took Effexor for 3 years, most of the time 150mg. 3 months ago, I took my last dose - the first weeks were hard as I experienced brain zaps, nausea, and I always felt agitated. But those symptoms vanished by the time.

The last few weeks, suddenly, my brain fog started to get worse, and now it's really hard for me to articulate, and in general, it feels like my head is working more slowly.

The weird thing is, my mood is generally good, but on days when my brain fog kicks in, it also affects me, and I feel unseen.

Unfortunately, my next meeting with my doctor is in one month. I think this is still a withdrawal symptom, as it started to get worse after the withdrawal.

Has anyone experienced something like this?