Erections for hours after sex? Not on a Rx!

[April122002]

I am a 25year old male. Im healthy with no STDs. I've noticed in the last year and a half or so, after I have sex with my wife I stay "hard" for hours and i cant get it to go down. The worst part is that usually have to pee badly after sex and I cant go when Im hard. Sometimes I have to go so bad that i force the pee out with a full erection and it hurts but i feel better afterwords especially cause after I get the pee out the erection goes away. If I do not pee I will have a very hard erection for hours afterwords to the point it is so hard  that it hurts. For example last night I had sex around 10pm and went to sleep and woke up at 4:59am with a very hard and painful erection and strong urge to pee. I had to get up and go to the shower and force the pee out. Afterwords I was fine and went back to sleep.  Im concerned because since I have started doing this I have noticed that routine daily urination's are effected in that after I finish a normal urination, it feels like i got all the pee out and after a couple minutes or so I feel my underwear get wet. Some more urine comes out even after I'm done. Its not that i don't shake afterwords...trust me i do. And the amount of urine that come out afterwords is probably around a table spoon or so. I don't want to cause any problems with my urinary track, so any advice would be great! Has anyone experienced this before?

And in case you were wondering I stand in the shower when I force the pee out so I dont pee all over. :)