We’ve had the second night of this too and I’m at a loss with what to do 😭.
Could you maybe have the room light so it feels more like a nap than actual night sleep so his routine doesn't change so much? We use ashtons teething powder. I put a bit on his dummy and try to move it around. I think it helps but he does still seem a bit upset still. He really likes his monkey teething toy too, I would highly recommend if you don't have one already xx
Last night I cried from 3-5 then my mum took over and held her to sleep. AWFUL night.
Really recommend Anbesol liquid