Sleep regression 😖

It happened to us! I was dreading the 4 month sleep regression and I’m not positive this is what’s going on, but the passed 3 days my baby is refusing to nap and when she does she has to be held and it will only last 30 min max. She used to always have a midday nap for 2-3 hrs. She’s also very hard to put down for the night when she used to very easy and predictable. She was sleeping 6-8 hr stretch but two nights ago she was up ever 1.5-2 hrs and last night every 2.5-3 hrs. She will be 15 weeks on Tuesday. She has also been chewing her fingers and drooling like crazy but won’t take a teether. If any mamas have any advice, tips, encouragement please share! I read if this is a sleep regression it can last indefinitely 😰