Terrible sleeper

Is there a 11mo sleep regression or something lol. Past two weeks my son has been a TERRIBLE sleeper. It takes 1.5-2hrs to put him down now. Before it would be so easy. He would pass out after his night time bottle but now he’s awake and screams if you leave. We have to stand their with our hand on his chest for that long hour and a half until he falls asleep. Idk what changed. It’s crazy. He also wakes up through the night. Idk if it’s his teeth but holy moly. Anyone else? Any tips/suggestions?