[connie777]

First...male dogs don't go into heat. Only female dogs go into "heat".
An very good product for cleaning the urine, vomit and poo is Nature's Miracle. It's a liquid and available at PetSmart and many other places. I think I even bought it once at Home Depot or Menard's. Not sold at Walmart. Follow the directions on the bottle.
I had my puppy Bentley neutered at about 6 months of age. His father is an AKC Yorkshire but his mother was Yorkie and 25% s**tzu so i did not plan to breed him.
I had him neutered because i wanted to calm down his macho attitude a bit. And i didn't want him to start the "leg lifting" 9marking) around the house. When I took him to have his nail clipped at about 5 months of age he became so ferocious and nasty...even with two people and a muzzle the job could not be done. The groomer suggested he'd probably be more agreeable after he's neutered. Though he was always a sweetie and very nice except for nail clipping.
Anyway...I understand it is better for the health of the dog to be neutered unless you are planning to breed him.
Nature's Miracle is really the best odor treatment.
Do you have puppy pads in the bathroom for him?
I found puppy pads slowed down our housebreaking and I regretted using them. Because allowing a pad is the same as telling the dog to pee in the house. It felt like I was rewarding him for peeing on the pad. But in his mind he didn't know that and probably thought I was rewarding him just for peeing.
I have been able to get him trained without the pads now. But while I was using them...I ended up placing pads in several places. If he peed on the floor (or pooped) I would immediately use the Nature's Miracle on the spot. Then I'd put a puppy pad there as well. And I watched him closely. If I caught him about to pee...I'd take him out fast...or if it was not able to take him out...I'd put him onthe pad.
I suggest:to take him outside more often to prevent the mistakes in the bathroom. He's only 3 months...so he can't hold it like a big boy yet.
Good luck