You won't die hun but there can be complications of the op as you get older as I know all too well. I haemmoraged a week after getting them out & needed surgery. It's not common for this to happen though with every one.. I guess that I was one of the unlucky ones. You will be fine
relax,u wont die!.Tonsil removal is quite common operation,complications involved are damage to recurrent laryngeal nerve(related with tone of your voice) and bleeding.But incidence of these complications is low and can be easily handled by doctors in operation theater.good luck!