I have just had abdominal surgery, the anitbiotic I had to take before surgery made be very sick I threw up and my throat and mouth burn as if i had a sore throat and I received bag after bag of IV antiobictics for my three day hospital stay. When I opend my mouth this morning because I had a severe sore throat I had a bunch of little white spots in the back of my throat, also during my hosp. stay my blood pressure droped because i was severly dehydrated and need more than usual saline. could this be the cause of thrush, will this go away or will I have to see my Md.