I also take Zoloft for anxiety. For the first week I got terrible side effects, was really nervous and shaky, which was expected so my doctor also gave Ativan to take 'as needed' to relieve the side effects. It worked, although I took the Ativan for two weeks, .5 mg/day. I was sometimes light headed, but mostly really anxious and sort of had this feeling like I wanted to jump out of my skin. I was also scared to increase my dosage cause my side effects were still bad after a week on 25mg, but my doctor strongly advised that I increase it, and she thought I would only get optimal results on the 50mg. Sure enough, she was right. Right now I've been on the 50 mg for 5months and I feel great. So you might want to ask your doctor what might be the best thing for you to do. They might even suggest a different medication, or give you something like Ativan to take as needed.