Morning Bladder Issue

[Happy1]

So I just got back from the doc because I thought for sure I was beginning to have UTI symptoms (I've had 2 UTI's in the past 10 years). It started yesterday morning when I got up to use the bathroom and went but felt that my bladder contracted before I was done and I still had to go but couldn't. It felt like that for a good 2 1/2 agonizing hours and then that feeling just disappeared and I was all normal again (which is unusual for a UTI). The same exact thing happened this morning except this morning I was super duper angry because I could not comfortably complete my workout. Nothing messes with my workout! So I decided that with the weekend fast approaching, if it was as UTI I'd better get in and get checked for it. I just took a nurse appointment because I figured that's what it was. I was checked over and the tests came back negative for everything. According to that I'm as fit as a fiddle. So what on earth could it possibly be? I decided to wait until next week and if it's still bothering me I'll make an appointment with the doc. Any suggestions?

Thanks for any help!

Nikki :D