Thanks for all of the support!
I just found this forum a few days ago and it is already GREAT!
I have a big issue with UTI's as well. Before we started TTC I wouldn't even cuddle after the BD... it was straight to the bathroom to pee away the possibility of a UTI. We have been TTC since November and I have gradually increased the time between BD and the bathroom. Now I lay with my hips elevated for 30 minutes and have not had a single UTI (knock on wood). I started with just five minutes and increased my time by another five minutes every week or so.
So, I would suggest starting out slow to make sure you aren't going to get a UTI... and drinks lots of cranberry juice :-)