I have fibromyalgia and started taking Effexor xr last fall to he...

I have fibromyalgia and started taking Effexor xr last fall to help combat fibro symptoms as recommended by my doctor. I am also prone to SAD. I have found that my fibro symptoms are worse if anything. I crave junk food and sweets. My doctor told me the drug could not be causing the cravings or the resultant weight gain. I finally five days ago told the doc I really didn't feel I was benefiting from the drug and she agreed that I should stop 'cold turkey'. Wellll! since then I am having nausea, chills, very vivid dreams, bordering on hallucination. I feel I have been sleeping for hours during the night and find it's only been two or three hours. I'm still not refreshed, but I can't get back to sleep. I find myself crying for no reason at all, feeling anxious, feeling angry at the least provocation. Chills, runny nose. While I was on Effexor my libido was non-existent. Now it's increased greatly. What is up with this drug. how long can I expect the after-effects to last? I had to stay home from work today for the nausea and tiredness and just general over emotionality. Calgon take me away