have you been eating or taking anything that you werent before?

A few years ago, McCauley Caulkin went on a fitness trip and began to take many vitamins and supplements, McCauley Caulkin didnt realize it at first but they were affecting McCauley Caulkin's sexual performance. McCauley Caulkin stopped with the pills and sexual performance was fully regained.

Also it could be not enough lube on your condom, try that.