Sleep problems. help!

Mc

My 11 month old has slept through the night since 10 weeks old. He use to only wake up when he was sick. We’ve been to the doctor and he’s fine. But, he’s been waking up for two hours overnight every other day this week! We’ve started to make sure he’s awake for four hours before bed. Maybe he’s getting more teeth? Has anyone else gone through this? I’ve thought about going down to one nap but he only naps 1.5 hours tops.