what the f&*^&* is wrong

I took paxil when I was 25 for 6-7 months for some mild depression. When I felt better I just quit no problem at all. Now at 52 I was on it for about 4 months and couldn't deal with the E.D., constipation,weight gain(20 lbs in 2 months) and flat line personality. I went from 20 mg to 10 mg over a month and then stop cold. Its been more than a month now and the E.D. is gone,lost 10 lbs,no longer constipated but now I get easily annoyed/angry,my head is almost always spinning,I have headaches on both sides of my head just above my ears that Excedrin won't touch. I am /was having dreams/nightmares that seemed so real. They have since subsided. I ache all over & feel like Im coming down with the flu but it never comes.. I am really exhausted at the end of the day whether I physically work hard or not. My balance is questionable enough that I won't ride my bike. For fleeting moments I feel right again then.... wwoosh!. My doc says go back on it and ease off it over a longer time. HUH?? How long can I expect to go thru this before I'm normal again? Im starting to wonder if there may be something else wrong with me and this is not Paxil withdrawal side effects.