17 month old maybe sleep regression

Baby boy had been a bad sleeper we did cry it out and he had slept solidly through the night for

about 6 weeks. However since daylight savings time night sleep got shortened by an hour and now he is having split nights again where he’s up 2-3 hrs if not being rushed back down. First night thought maybe a one off but now it’s the third. Tried to start cio again and as he was starting to calm down he dropped goes pacifier forcing us back in the room and it had already been nearing an hour at that point. Typical schedule is 6:30-7:30 rise 12/1230-2 /240nap (capped at2 hrs) 7:30-8:30 ish bed time. Rocking him he stays awake for a while now and then wakes up immediately upon transition to crib. I also don’t want to encourage bed sharing at this time

Do we just do cio again? A lateral incisor popped through last week with no issues to sleep haven’t seen any additional budding teeth. No fever. No charge in diet. Just so frustrating bc I’m also b 34 weeks pregnant and working and can’t imaging it staying like this plus a newborn soon