I have a wash in right now.
It's probably - hmmmm - the 20th time one of our cats peed on on a comforter.

He's not allowed near it anymore but he sneaks in when I don't see him. I don't need to run to any store to buy another one. I have stain and smell remover and three times it will go through the cycle. (And yes I realize that cats pick up their own pee scent - but for this one it's a bed thing - he's gone on the couch but not over and over). I'm not trying to be sarcastic with the wash and such - I just want to put out that one of our cats has peed (and #2) on two beds (through to the mattress - which we still have), a couch, the bathtub, the shower, and pillows - he ADORES pillows.

Just ADORES them. So I know how crazy it can make you OP. Honestly.
I'm a dog person. Had two cats. Brothers. We had no issues with them. I had no idea we were blessed.
One died suddenly and in an awful manner - acute kidney failure (and threw up on everything of course as he died) - at around eight. For six months his brother was in mourning (really) - cried in an awful way and we lived in 440 sq feet at the time so it was ENDLESS. Wouldn't come out of the closet. So I got him a buddy.
Buddy named Neville - never realizing that would rhyme with devil - is a behavioural peer.
My house does not smell like a litterbox. It doesn't. I used the spray above all the time. Never thrown anything out except about twenty pillows. (remember it's his great peeing love)
I'm lucky - he can go for months without this nonsense and then surprise.
OP - I am sorry you're in so much pain, I am, but pets take great sacrifice. The bedrooms are no longer open to Neville. And I HATE THAT. H-A-T-E I-T!!!! I love natural light and HATE to close doors. But I love him more. We used plastic for awhile but I hate the feel of plastic. So doors closed.
If anything - I guess this is a good thread for people thinking of getting pets. There is a good chance they will pee or poo on things repeatedly at some point in their lives. Because they're sick or some because they just have that way. If you're lucky - like I was with the brothers - it will never ever happen - not once. We were so incredibly lucky. But it can - and go the no pets route if you can't handle it.