Over the past few years I have taken valium on and off. Sometime a year in between. However, for the past year or so I have been taking 5 mg-10mg a day. Two weeks ago, I decided to stop taking it for good as I was experiencing some opposite effects and believed I had reached my capacity for it. Two weeks later, last night, I was experiencing a really bad headache with nausea. Could this have to do with withdrawal? Not to mention, I have also drank beer moderately for the most part. That, I have put down as well. It's a bit hard to come off both at the same time but not taking valium is more important to me now. How long could this sort of withdrawal last and could it be dangerous?