Regurgitation/snake not growing or shedding

Hello, I am a new snake dad. I got my first snake in November 2020. The night I brought him home he regurgitated his food the reptile shop had fed him that day. 2 weeks later he died. They offered me another anery corn snake that hadn’t missed as much meals. She was doing great until she had regurgitated her food 2 weeks ago. She’s been kinda acting like my first snake did before he died but I could just be paranoid. She’s still eating her pinky in about a minute. My first snake the only meal he ever ate in my care took him like 10 minutes. When I got juju (the 2nd corn snake) she had shed right before I got her on November 30th. It’s January 31 and she still hasn’t shed. Am I doing something wrong? Am I going to lose her like I lost my first one because she regurgitated? I’m stressed out and paranoid!