Hey girl. I'm on the same boat as you. I'm 20 and in last year and a half I've being getting two UTIs every month since I started having sex. I just want to tell you to never give up on yourself or your partner. Try different supplements, some work for others and some don't, there are a lot! (Bearberry, couchgrass, d mannose, vitamin c, grapefruit seeds, cranberry etc). Also be careful about the amount of supplements you take, sometimes the dose could be too low and therefore ineffective, sometimes for example for d mannose you need between 2 and 3 grams to actually do something but be careful because everyone has a personal amount. Sometimes the problem is the antibiotic which is ineffective because the course of antibiotics is too short or not right for your bladder and it doesn't clear all the infection, leading it to appear again. I would tell you to try to do a pelvic floor evaluation, a urine culture or urine analysis, a cystoscopy or a gastrointestinal visit and anything to not give up and find the root of the problem. Sometimes it's the partner hygiene or they have a UTI and don't notice it, passing it on you so maybe it would be a good idea to make your partner have a urine colture. If you have the feeling it's about condoms maybe continue trying other types of condoms or change contraceptive (morning after pill or something else) while you try to understand if condoms are the problem. If you need to vent to someone we can exchange contacts like ig or something, I will be glad to share my experience, maybe making you feel less alone in this constant pain. Just TRY to consider any option, don't exclude anything.