My puppy is six months old now and has started behaving much worse

My puppy is 6 months now I used to be able to take him to coffee shops taking on walks and to doggy daycare without any issues and he essentially was house trained but now all of a sudden he barks at absolutely everything and is peeing on thing the couch my bed and clothes he did just get nooded about three weeks ago but it did start happening before that any ideas on what to do I have only ever had a labrador puppy before and he never had any issues with anything all and I know it's bad but now I can't take him out anymore let's learn to some kind of training course because as soon as we get near another person or dog he just barks like crazy With the barking I have tried the quiet method where you give him treats after you tell him to be quiet once has been barking at dogs but he ended up just barking at me so I would give him treats