Itching after sex

So ive recently started seeing a new guy and we went out of town for 4th of july. We had amazing sex for 2 days basically, we used condoms the same brand ive always used. However his penis is a lot bigger than what im use to. I got super swollen down there, and now the swelling has subsided except im still having a crazy amount of itching.

He doesn't have any stds and we used condoms like i said. So is there anything i can do for this? Is it normal? Its been 2 days since we've had sex.