Sleep regression+possibly teething

so

My guy has been going through the 4 month sleep regression for like almost 3 weeks 😩 he used to sleep 6-8 hours straight and now we’re lucky if he sleeps 2-4 hours straight and 30-40 min naps 4X a day. Now I’m back to having sleep anxiety, anxiously awaiting for him to wake up and knowing I’m not going to get much sleep. He was doing so well less than a month ago, now it’s back to being a little more difficult 😞 Plus i think he’s starting to teeth on top of it: pulling his ears, flushed cheeks, easily angered/grumpy