Nutted 7 times in an hour and now my balls hurt

Was jerking off with my friend (like we normally do ever so often) as I licked out and jerked to his wife’s panties (she was at work). Over about an hour I busted about 7 maybe 8 nut. He got 2.

Now almost 2 hours later my balls area and even my butt area feel like they are overly tight and ache. Almost as if I need to take a big dump but don’t need to.