I found Zoloft increased my anxiety for about 6 weeks and the doctor prescribed Clonazepane to counter the effects until I adjusted. I am now off the Clonazepane and only using Zoloft. However, the one thing my doctor did tell me was to take the Zoloft in the morning as it can cause insomnia if taken just before bed. For me it actually triggered a sever panic attack in the middle of the night the one time I took it before bed. I am now careful to take it in the morning and feeling much better. It took time and there were days where I was tempted to quit because the combination of drugs made me dozy and stupid but I do feel a lot better after two months. I would suggest talking to your doctor about how it is making you feel and see if he has any suggestions.