Swanson L. Reuteri Probiotic Plus with L. Rhamnosus, L. Acidophilus & FOS Prebiotic for Gut-Health-Conscious Adults - 7 Billion CFU (30 Vegan Capsules)

Also, please please take probiotic supplements! It doesn’t directly answer your question but I had the same issue, and overtime the antibiotics destroyed any “good” bacteria I had and made me even more prone to UTIs, also caused by E. coli. It was a horrible never ending cycle. The only thing that fixed it for me was getting lactobacillus reuteri probiotics (linked HERE) and I honestly believe they saved my life. I’m sure there are other brands too that could help. I know everyone always says “eat probiotics” and whatever but genuinely these target E. coli SO well and will help you build up more resistance to any E. coli in the first place. I hope that your situation gets better!