Hi Joshluck, it does sound like you need an adult circ. Not the most pleasant to contemplate but a bag of frozen peas will help.
It's important to be able to get in there to clean and, while really low statistically, will reduce cancer.
While I don't own a penis, this is a mum of 3 boys writing.
I know a couple of young lads that had to get it done and they've gone on to thrive. Pleased they did it.
It's not that typical to be unable or unwilling to urinate when you have thrush. Has a Dr confirmed this as it may be a urinary tract infection (UTI). Unusual in young men but very common in women. Antibiotics will be required.
If it is thrush, a diflucan or canestan tablet from the chemist should clear things up. If that doesn't nail it, ask your Dr about flucanozole. My endo prescribed this when I had a nasty infection due to my medication.
Whenever you have antibiotics, make sure you follow up with a probiotic tablet everyday for a month afterward to build up the healthy bacteria in your gut that fight thrush as antibiotics kill both good and bad bacteria.
good luck and yes, it is a pisser to have one more thing to worry about.