MAJOR sleep regression!! 😢😢

So my daughter went from waking on average once a night with sleeping completely through the night 2-3x/week to waking EVERY 1.5 hours!! This has been going on for the past 2 weeks, it was *maybe* teething at first but now her teeth have settled.

This is so very frustrating because I had a dream sleeper since 4 months old to basically back to newborn sleeping habits. Is it also a coincidence or not that the sleep regression started exactly the night my in laws came to stay and visit us? The in laws haven’t left yet so maybe that’s the issue? I don’t see how that would affect her sleep though. Ugh this is so frustrating, it has made me such a grump throughout the day and my in-laws get to see the lovely overeating (lack of sleep causes me to stress eat a bit 😩😩) , grumpy woman that their son married 😑😑

Any suggestions/comments anyone?