I would check out WebMD.com or make a phone call to a Urologist (sp?).  I will speculate that antibiotics could have changed something, but I am no expert.  
Aren't you reducing your own sexual pleasure by worrying about something that you can't do a thing about?  I seriously doubt there is a pill that can make you have stronger orgasms again.  If so, I would imagine we would know about it.
I think that if you relax and are thankful you get to have sex 4 times a day, that you will be blowing holes in the wall again in no time at all. 
