My son is almost two months old and dh and I made the choice to leave our son as nature intended

My mom did not have my brother circ'd and I have never believed in harming an infant through an unnecessary surgery so that it would be more "aesthetically pleasing" to society. When I was pregnant w/ my first baby, my husband and I researched this topic, but later found out we were having a girl. When we found out that our second baby was a boy, we furthered our research and decided not to circumsize him. I never thought I would circ, but wanted to come to the decision along w/ my husband, and luckily (for him, lol) he felt it was cruel to circ a baby (although he is circumsized). His family thinks I am a weirdo and has no idea why anyone would not circ a boy, but they are not very educated and pretty closed minded people, so it doesn't bother me. Most people who know our son is not circ'd question me as to why we didn't it, and some have the audacity to make snide remarks on his appearance "down there". The main thing is I know I made this choice based on scientific research and the best interest of my child and that is all that matters.
All that aside, when my baby was only 5 weeks old he was diagnosed w/ a kidney infection, caused by e. coli. I had no idea he had a uti, he was not fussy, no fever, no apparent symptoms, until it went to his left kidney and the only symptom he had then was a fever of 101. After being hospitalized for 7 days on IV antibiotics, and having tests done to see if he had any structural problems in his urinary tract, I was told by a ped at the hospital, as well as a nurse, that we should circ him and that babies who are circ'd do not get utis. I initially felt so guilty, that I caused him to be sick because I did not have him circ'd, but then I remembered all the research I had done and spoke to many more doctors and they all told me that utis are so rare in infant boys and that there is a very small difference in the numbers, so small that it is not considered a higher incidence.
While Carter was in the hospital and the nurse was putting the catheter in, she partially retracted his foreskin. I was livid. He was bleeding and crying and she did not need to retract him to insert the catheter, but she was a student nurse and apparantly did not know what she was doing. Anyway, my question is now that he was partially retracted once, is there any special care or cleaning instructions I need? Before I was told to just wipe it like a finger while changing his diaper, but now do I need to do anything besides that? I am so careful to clean his penis very well at each diaper change (not that I didn't before) because I am so afraid of him getting another uti or kidney infection. Also, is there any risk to him having baby wash in his bath water (not like a bubble bath, but just having him soak in the same water that we washed his hair/body in)? I have never known of a baby having a uti (let alone a male baby) so I really wonder how he got it and how I can prevent it from ever happening again. Thanks!