I think I have the flu but not sure, I keep feeling dizzy and sick. I have a rash on my arm and neck. My doctor before said it was stress. Death?

As above. Make sure u see u physician for evaluation and work up , and if not satisfied with him / her see a different one for second opinion.
Death? NO! This doesn't sound like influenza, which typically won't cause a rash. You should see your doctor again. If you're feeling stressed, it may help to talk to a therapist as well. That said, there is probably something going on causing the rash and other feelings, so revisit your doc and ask some more questions. Good luck. I wish you the best of health.