What Causes Nausea And Sweating When Suffering From Stomach Cancer?

My husband has recurrent stomach cancer so to help me deal with it I have been taking .50 mg of Xanax right before I go to bed at night. I ran out a few days ago and have not been able to refill my position. After getting up out of bed I am feeling really strange. Weird, dizziness, nausea, sweating. I end of laying on the cold bathroom floor until I feel like I can get up. Could this be from taking the Xanax. I feel I should go to the doctor but I don t think I can drive myself. What do you think?