I just started bleeding again this morning and had my period exactly a week ago but only for 4 days. Saturday night I went to a haunted house and got extremely car sick and never ever in my life have I been car sick. I had a little migraine too and sunday came I got extremely nausea it never went away all I could eat was crackers without getting sick and sunday still very nausea and got a little dizzy and had a bad migraine again all day. Nausea whenever I ate mostly except crackers. What could this be?