3 year sleep regression?

Anyone else having a stupidly hard tome?? My boy was sleeping amazingly then this last week or two he hates going bed and wakes up constantly for 2-3 hour periods. I’ve read about a 3 year sleep regression, but am also aware he’s cutting his back molars and has a big change in that I’m 6 months pregnant. Anyone else dealing with pregnancy and a 3 year old??

Lack of sleep is seriously making me struggle. Probably getting 3 hours sleep at the most I’m beyond exhausted..