1 year sleep regression? Teething?

My son has had a roughhhhh few days. Very cranky, clingy, up, down. He normally sleeps 9-10 hours at night. But lately, he has been a beast getting down to sleep and he’s been waking up in the middle of the night crying. No fever. There have been a lot of changes, we stopped breastfeeding mainly. I just don’t know if he’s having a hard time adjusting, teething, regressing...? Anyone else relate? It’s taken such a toll on us. We are all exhausted and struggling.