My 5 month old frequently wakes up

Pa • #ttcbaby#2#ttcinlate30s.

My 5 month old baby (who was sleeping thought the night except 1 feed) is now waking up 2-3 times and crying. We had already gone through a 4 month sleep regression at the 4 month mark. This is a new change in his sleep pattern.he is otherwise fine .

What could it be? Teething? I don't see any redness in gums.