6 month old not sleeping

Kaiti

My baby has always been a pretty good sleeper at night. Usually does 8:30/9:00-5/6:00 a.m. & as of Friday he’s been a H O R R I B L E sleeper. He’s going down cranky & fussy and waking up every hour or so. I am soooo exhausted and don’t know what to do 😖. Is it teething? Sleep regression / growth spurt?! Anyone else have this going on?

At least he’s cute 🤦🏽‍♀️😂