I ve been having a lot of dizziness and nausea lately. The other night I awoke at 1a.m. extremely dizzy, nauseous, and full of sweat after eating a dinner of fish fillets, salad, macaroni and cheese and a brownie with a glass of milk. It took most of the day for the symptoms to dissipate. I vomited several times with the dry heaves and couldn t even keep water down until late afternoon the next day. Btw I m 59 and a little overweight. I have one kidney. I donated one to my grandson 14 years ago.