I've been taking zoloft for 2 months. Started out at 25mg, then ...

I've been taking zoloft for 2 months. Started out at 25mg, then uppped it to 50mg. The first couple weeks I experienced shakiness, headaches, muscle twitching and vivid dreams. MOST OF THE SIDE EFFECTS WENT AWAY AFTER 2 WEEKS. The side effects I still feel are the jaw tension. Also I started to have spotting between my periods which I've never had before. Has anyone else experienced spotting? Overall it has helped eliminate the panic attacks but I still have a overall sense of anxiety.