I had really bad Effexor withdrawal as well. With brain zaps etc. Though luckily it didn't last that long.. only a couple of weeks.. It sounds a bit dangerous to have diarrhea for so long, though, so I think you should definitely talk to your doctor about it. Maybe you could go see another doctor instead? Whatever is the cause, it's important to find out, though.. It's not good for your body to go with diarrhea for so long.. Dehydration and stuff. And it could be caused by something else entirely.
"A journey of a thousand miles begins with just one step." - Lao Tsu -
"I get up. I walk. I fall down. Meanwhile, I keep dancing." - Hillel -