I was taking Zoloft 200 mg a day for over three months, then due to some side effects I was suppose to taper down to 100 mg of Zoloft plus Venlafaxine37.5 mg but due to insurance problems I am only on the Venlafaxine. I am having a lot of problems with sleeping,headaches and my body is sore to the touch, mostly the top of my arms/shoulders. I am waiting to see the doctor, and was wondering if this is all "normal" I am just so tired of being tired... thanks for any help.