Okay, so you know that the sores in your mouth are hsv1. That's part of the answer. You knew that you had that.
The covid vax might have triggered some of this, though it shouldn't have lingered this long. It also wouldn't cause you to be immunocompromised. Something else might be, though, and you need to work with your doctor on finding the cause of that. Some simple blood work would be a good place to start.
Your husband needs to test.