Not Sure If I Need To See A Doctor. I

Not sure if I need to see a doctor. I went to the doctor last Monday for a horrible cough and chest congestion. I was prescribed sudafed and tessalin gel caps. The cough didn't change. On Friday at work, at a day care, I felt a little dizzy and lightheaded. I then got nauseous. After cooling off, I felt better. Saturday morning I felt like I was on fire, and had diarrhea, but it only lasted for an hour. At 9:30 on the way to the store, I threw up on the side of the road, twice. I felt WAY better. I headed to the store and then to a house I just bought to start cleaning it up to move in. While there, I got the hot and nauseous feeling again. I went home and was in bed from 11-8, only getting up to go to the bathroom. I vomited again at 12 and 8. I was asleep from 8:30pm until 8am Sunday morning. I felt great Sunday and went back to work on the house all day. At 4pm I started feeling ill. I went home and continued my evening. This morning at work, I got hot, nauseous and threw up, twice.