Here is a link to the things that can cause a diagnosis of PTSD and all the symptoms that go with it: DSM-5 Criteria for PTSD - PTSD: National Center for PTSD

There are also some other anxiety disorders with similar symptoms. Clearly, you're suffering, and it's no wonder why, that type of awful, long-term intense care-taking along with your other issues, well, your symptoms make perfect sense to me. I hope you'll find some relief. I've found therapy to be a huge help and getting a diagnosis from a professional can give you a sense of a starting place to work from, along with just sharing with someone all the difficulties you're having now. Hope you are taking extra good and gentle care of yourself and get some support here and in-person.