Two week old puking after feedings..

My daughter has started puking after feeding, just within the past two days. I would say spitting up, but it’s like full on, vomit puddles in her lap. It’s not after every feedings, but it’s happened twice today.

She’s also become very restless throughout her feeds. she comes off my breast multiple times, tries chewing her hands instead but is still fussy and comes back to my breast. She’ll also stretch out, seem frustrated and “rip” off of my breast from time to time. She also gags quite often and chokes, resulting in her coming off multiple times as well. Before a few days ago she was a wonderful eater.

Is there anything I can do to help her? We have her two week check up tomorrow and I’m going to a breastfeeding support group the following day, but this has really started to overwhelm me