18 month old up every hour in the night lately. I’m dying over here. Someone please offer ideas
Probably teething. Baby Tylenol before bed will help him with teething
Limit naps during the day, extra playtime, limit sugar before bed and wear them out playing during the day. No ipad or phones before bed. Warm bath, lavender lotion, quiet time reading to them.
Teething or regression. Tough it out, maybe try ibuprofen
Turn the baby monitor off 
Do they make baby Ora-Gel? If not you can go way old school and rub Scotch or Rum on the gums.
And yes, lots of active play, climbing, jumping with supports, tumbling classes, baby exercise videos, turn on music and dance/move. Swimming classes are excellent if that’s convenient for you.
Big dinner, nice wind-down til bedtime, maybe white noise machine, weighted blanket or weighted stuffie. Maybe a freezable pacifier or frozen teething ring to chew on.
Do not turn the light on or speak when you go in to comfort, change, or feed her/him. Shushing sounds are OK. A small dim light if you need to see to change a diaper. As little interaction as possible: pat baby’s back, reinsert or replace frozen teether or reapply mouth numbing cream.
Can you sleep on an air mattress in the same room? That way if she or he wakes, you’re visible and maybe that’s enough to roll over and go back to sleep.