Dealing with Chronic Bladder Spasms: Help Needed!

what to do when you don’t know how to deal with your pain anymore? i’ve had bladder spasms for months, it came on out of nowhere, no uti, nothing found on cystocopy, no bladder infections, not caused by medication (i hope because the only thing it could be is my zofran) it’s listed on my patient portal as urinary frequency though. (that’s the only thing they say about my bladder is that it’s bladder spasms) but i’m starting not to be able to deal with it anymore. they never go away. i’m in constant pain and it feels like it’s never going to get better. they prescribed me a belladonna opium suppository that NO pharmacy near me carries :/. i just want to be a normal 16 year old, i have vacation on the 23rd.. i don’t think i can go, i can’t even withstand being in summer school for 4 hours (i wasn’t able to go to school this year and failed 2 classes). please help, any tips or tricks i will gladly take.. any medications i could try??