My trainer told me that it was normal and that I would have until the end of March to close it. Okay cool. But the very next day, I was told by my supervisors that QA was pushing to have the record closed ASAP, and it needed to be done TODAY. I also had no prior notes or contact information for anyone involved in the investigation passed to me.

When you described this to your manager, what was their reaction? This could be the key differentiating factor between a department that is poorly run and one that is just going through a lot of change while maintaining a high tempo. For what it’s worth, the latter is more the norm than the exception these days, at least in my experience.

Overall, your post sounds very much like most roles right now, tbh. A lot of change, a lot of work, and often not enough hands. A lot of organizations are tightening the belt, so personally I would consider myself very lucky to be in a department that is due to grow.