I've had recurring uti's over the year, they're awful! But I'm glad you're on antibiotics. You should be fine continuing to try this cycle. I spoke to my doctor about this once and he said the antibiotics won't hurt the pregnancy, and as far as disrupting the cycle, it could but I'd just use OPK's to see when you O just in case.

but other than that, take cranberry pills (as far as I know they're safe during pregnancy) as well as long as you don't take more than the daily dosage) drink lots of water and get rid of it, but I don't think trying should be a problem.