i agree with above posters.. i know how it feel wen u pass 2 failed months.. im still ttc for almost 2 yers now... still holding n' praying waiting for some miracles.. without going thru exp fertility tret.. Hope you will get ur BFP soon. Baby Dusts ...:)
Ttc is very stressful, I found using ovulation predictor kits really handy as they tell u when u are likely to ovulate and therefore the best time to bd.
I'm unsure about the uti treatment but i wouldnt think it would affect ur chances of conceiving.
Try not to think about getting pregnant and just have fun, you'll get ur bfp when ur least expecting to, it seems to be the way :)