So this question is for all you Mama's out there. I'm almost 8 weeks PP, I was diagnosed with a UTI at my 6 week…

So this question is for all you Mama's out there. I'm almost 8 weeks PP, I was diagnosed with a UTI at my 6 week checkup, completed 10 days of Keflex....I'm pretty sure the UTI is coming back since I've been off thr antibiotics for a week. My little guy is exclusively breastfed. We cultured the urine and it grew E. Coli. Everything I've looked at says Keflex should've fixed it, but I've also read that breastfeeding makes you more prone to the infections because it makes your vagina dryer and the mucous thinner? Any other Mama's have this problem!? I shower daily and always wipe front to back, and I don't wear skintight clothes, and there has been zero sex since he's been born to cause it. I'm taking a cranberry supplement and chugging the water to see if that helps before calling the midwife. Any help or suggestions are greatly appreciated. Thanks in advance!