bladder infections for 3 yrs now im21 help

Hi i am a 21 yr old female who has had reacurring bladder infections since i was 19,ive been to a few specialists ive had a cystoscopy ,they found nothing abnormal my first specialist said it was family problems but i think thats ridiculous as its bacterially proven.I have compleatly had to change my lifestyle,i wear only loose fitting clothes as it hurts below my belly button to have pressure there so no more hipsters i wear cotton underwear,i now have taken to 2 showers a day(the one at night helps with the pain of after the toilet)im afraid to go to the toilet but i make myself therefore i have a regular 2 pees a day one in morn before my shower and one at night.I took alot of meds in these years but have found one that manages it a bit called macrodantin.i found stress definatly can bring it on but not always the cause.i take cranberrys tablets and juice they dont seem to help at all,it hurts to have sex now too, this started with my new boyfriend but weve both checked ourselfves out and no stds were found i wish there was so i could treat it.it seems i do eveything right my energy is very low and just found out i have functional hypoglcemia
one thing though-i think i know what caused it i was taking a shower and i accedentaly cleaned wrong /but not from my anus/just kinda swiped past my pee hole and i felt like i was going to get one (i only had one before when i was sixteen due to sex) it was weird i just knew it was comming but i didnt know it wouldnt go away.my life isnt worth living with this pain i feel like my will to live is so low...i cant make any life for myself without being able to work like this ,at firstt the doctor told me a year then they said two years now they tell me after im 25(it will go away,but with some randomly thru out life) i feel the doctors dont really care because im young i want to get off the antibiotics so badly i weaned myself off them using hyprex which was a godsend i thought i was going to beat it but six months later it came back full force /they tried to get it with noroxin which is 500 milligrams or something it was very srtong and made me so sick i couldnt walk ive always been healthy im petite build i drink only water pretty much now i dont drink but i smoke (im trying to quit) help