Welcome to the forum. Thanks for your question.
As you were correctly informed on the community forum, oral sex carries little or no risk for HIV. For details, read the following thread, plus the others linked in that one. You really don't need HIV testing if these were your only potential exposures, although I would understand completely if you decide to do so for the reasurance value of a negative result.
http://www.medhelp.org/posts/STDs/oral-sex-question/show/2159728
As for your "UTI" symptoms: how old are you? UTIs are rare in men under 40, and your symptoms are equally or even more consistent with genitally focused anxiety, causing bladder spasm etc.. With a negative or weakly positive leukocyte esterase result, plus negative nitrites, those results also are not consistent with UTI. It is conceivable you acquired nongonococcal urthritis (NGU), sometimes maybe caused by normal (non-STD) oral bacteria and therefore a possible consequence of oral sex. However, NGU usually causes discharge, not the symptoms you describe.
I don't know where you read that UTI could be "caused by HIV", but that's not true. Those symptoms don't alter my judgment you aren't at risk for HIV.
If your urinary symptoms recur, stop any more attempts at self diagnosis and see a doctor or clinic. You could also discuss those symptoms if you decide to go through with an HIV test -- and maybe for completeness have a urine test for gonorrhea and chlamydia, but for the reasons above you definitely can expect these to also be negative.
Final comment, not really pertinent except to correct a misstatement by one of your partners: EVERY case of cervical cancer is caused by HPV.
I hope these comments have been helpful. Best wishes and stay safe-- HHH, MD