I think it has gotten bad since he started standing on his own, which was about a week and half ago. So that does make sense. Did you hold your LO a lot or is that not good to do? I just want him to go back to being a good sleeper, but I certainly want to reassure him.
I keep checking for molars, none have broken through yet, but teething has always been a big even for him, so it would not surprise me. I feeling like he has had lumps where his molars should be since he was 6 months, so I don't know I cant tell!