Elsa that has got to be so horrible. Back when I was a freshman I got very very sick, saw the on campus doc and he gave me PCN. I blew up with huge welts everywhere even the bottom of my feet. Called the parents in agony, mom came and got me took me straight to out doc who said I was allergic to PCN...but that's OK there are other antibiotics and it not like I need it to stay stable in everyday life. It must be terrible waiting this out and wondering which med or cocktail you can't take and what you can that will work for the BP.