for about the last two weeks i have been having pretty bad nausea, making it so i could not eat all that much. When i do eat i do not throw up but the nausea is still there. this has came and gone and also have been experiencing quite noticeable weakness and dizziness.i went to go and see my doctor and he said it was just a bad case of the flu. but i still have the nausea and weakness and im wondering if anyone knows what else this could be?