Habitual waking

Does anyone else have a habitual waker?? My boy is 9 months old and he started this about a month ago when he cut his first tooth. He wakes up between 12 and 2am every night and won't go back to sleep until 3-4 hours later. I AM EXHAUSTED! Haha.

He goes to bed at 8 every night and get two 1.5 hour naps during the day. His routine hasn't changed all that much except for this. I've tried everything I can think of to keep him from waking or to even just get him back to bed sooner. From skipping naps during the day to a later bed time. Nothing is helping. He's not hungry or overly fussy unless I leave the room. He shares a room with his 5 years old brother who just started kinder so I can't just let him cry it out.

Anyone have any tips? Lol. I'm willing to try just about anything at this point. Momma needs to start getting some sleep! 😳😴