First off, sorry you didn't get any help last time you asked. "go to the doctor", at least to me means "this website has zero worth, at all...". Well unlike me, you probably have something that even some what resembles a "schedule" of waking/sleeping.
I would try to plan and not drink anything at least 1 hour before bedtime...and work your way back until it's uncomfortable...like at 4-5 hours you might have dreams about being stuck in a dessert or an escape raft out at sea.
The other thing is ...well, try to piss before bed. I mean even if you don't feel like you have to, go through the motions and see if your body goes. I have pissed myself (as an adult) about 3-5 times, up until 25 I think. But I was either (why I stopped ever) taking sleeping pills or (why I stopped) getting stupid drunk.
I mean, it's shameful I guess because babies and toddlers are known most for it. So we associate the two and therefor, if you still do it then you must be underdeveloped. That can range from a host of negative thoughts about fear of being judged, not being an adult, dying alone, etc.
Oh right, so one thing you need to get is a "bed condom" as I call them. They are a sheet that is like rubber or plastic on time, the sides are usually cloth. So you put on scrunchy bed condom, then scrunchy sheet, then loose sheet. tadaa!
It saves from any spill; kool-aid, beer, a GF's heavy flow one month that forever makes it look like you had struck her with a hatchet. Having to explain yourself whenever removing sheets to do laundry in front of anyone... and then she wonders why you demand she take the mattress in the "break up draft" of mutually owned items.
So I honestly never gave a shit. I laugh thinking back, when my girlfriend at the time, woke me up one night with a whispering, "Hey...is that water in the bed, did you spill water baby? WAAAAIT... what's that sme....awwww noooooo! God dammit get up! What do I want you to do?! I want you to get a fucking towel!"
And I would be pissed too because who wants to wake up freezing cold, soaked in your piss? For you noobs out there, urine is warm only when leaving the body. Which probably only puts you into an even deeper sleep...relieved and now warmer than before.
BUT NOW it's like 5 hrs later and you just woke up marinated...past tense. After having a dream about falling into an Alaskan river, you wake up to launch in a groggy race to grab yesterday's dirty towel to and toss it on the bed. You might even be naive enough to think that your mattress it's totally fucked at this point.
And honestly, I think every time my reaction was the same. I woke up, immediately sigh in relief that I have one of those "bed condoms", throw all dirty towels I have on the bed, get back into bed.
....Then laugh at my girlfriend when she's swearing at how only toddlers piss the bed and she didn't know she dated toddlers. I reply that I didn't know she was a pedo either. Then she starts punching me in the back and I start laughing at her, I switch from light laughter into uncontrollably laughing, more hysterically the more angrily she punches...having fully forgotten she's half covered in piss.
After calming down....I would then proposition her for sex and get yelled at mid sentence. But after some masterful negotiating (we're still half damp with my piss, mind you), I then manage a verbal "raincheck" for the morning post-shower and go back to sleep. After showering, then sex, I hold up my end and cook her breakfast...after trying my breakfast, she never takes the same deal again.
I hope that story made you laugh, I was aiming to take something you dread and associate it with something you can laugh at. I can't imagine what your going through, I can only try and cheer you up.
But if you ever get "caught" then say you can't remember the last time you got that drunk...or make a tasteless joke about how you got roofied and your butt hurts...when assumed your attacker was a man, correct them that it was a very beautiful woman...unfortunately you found out what her "wanting a threesome" meant FAR too late in the game. By then your vision was already blurred, you'd forgotten the safe-word... and she was pulling out a strapon harnessing a big black dildo.
You see, humor is your friend...the more offensive, the more they will be psychologically "flashbangged" and not even know what the hell the conversation was about up until the point where you said that "really fucked up" joke. So remember, don't drink up near bedtime, try to piss before bed and invest in a bed condom...way cheaper than fuckin' diapers. Oh, one more thing.
Fucking diapers, really doctor? Diapers will at best develop into some weird fucking sexual fetish and at most... likely make you feel SO terrible and lack any self respect/love/esteem that you would end up hanging yourself...with a diaper. PLUS, I'd rather get caught pissing the bed daily than be caught once wearing a diaper.