I've been taking one to three xanax 25 mg pills everyday to go to school since January. I've been out of school since may 6th, so I'm not taking xanax. Lately, I've had headaches and I've started to notice my hands shake when I hold stuff. Like if I'm holding a fork or the remote. Could those be xanax withdrawal symptoms or have I not been on xanax long enough for that?