I would say that you came off venlafaxine extremely quickly, and that you are still suffering from withdrawal symptoms. I took a lot longer than you and went from 300mgs per day to 75mgs per day. At that point, not having a smaller dose in the house, I stupidly tried to get to 37.5mgs by taking 75mgs on one day, followed by nothing on the following day. This was totally the wrong thing to do, and I was hit with the most appalling withdrawals. This was just after Christmas 2023, and the last thing is very gradually going now. You should really get advice from your doctor. Otherwise, and bearing in mind that I am NOT a doctor, I would go back on venlafaxine at the amount you were on when your symptoms started, wait until they subside, and then reduce far more gradually.
I’ll be starting to reduce again as soon as I’m clear of my withdrawal symptoms. Best of luck!