Sleep regression

My daughter is almost 16 weeks and I believe we might have just started the 4 month regression early. She’s up every 2 hours or less and wakes up the second we put her in the bassinet. She used to sleep 5+ hours prior to this in her bassinet at a time at night. My SO and I have resorted to taking turns holding her in the rocking chair while the other sleeps just so we can not pass out at work during the day from exhaustion. Are we creating bad habits by holding her to sleep? Or is it ok to do this for now to get through this regression? It’s been a week and we’re already so exhausted. She’s been taking great naps with my mom during the day, she’s just having issues at night.