Hi mydad has had recurring cough and tightness in his chest so the Dr said it was bronchitis and gave he m amoxicillen. He took it until he had one dose left because a few days before he got a rash and horrible diarrhea which he thought might be the flu or a reaction now the tightness is back in his chest today after being gone for a week and his nose is really stuffed up with the diarrhea and rash?