Please help me... On effexor XR,?

I have been on it for about 2 years, 75mg. I have battled anxiety and depression for years, however things are different now. I Struggle with pain and joint issues, (I suspect fibromyalgia) which i have an appointment soon for. My question is, lately i have been blue. crying alot... for no good reason (the pain doesn't help either it is very frustrating) And i have had bad experiences with many depression meds. Paxil made me go CRAZY, and others do no help. They were all SSRI's. Am i in need for something else? or a dosage increase? I am always sluggish and foggy so i am naturally scared that if i increse the dose, it will get worse. It does help my anxiety for the most part though. so im in a pickle! i am scared. I just want to feel normal... mentally since i can't physically.