Struggling with ME/CFS: Has anyone experienced a decline and then improvement?

I know ME/CFS can eb and flow in severity with time, has anyone gotten progressively worse and then improved after a while?? If so, how long were you in the worst of it?? Did you feel better randomly or was it due to a lifestyle/med change??? I feel like I've spent the last five years on a slow decline and it's getting to the point of being unmanageable. I think I may have been pushing myself too hard in school and making it worse so I'm trying to be more aware of that but it's very hard to be health conscious and still get everything that needs to be done done. Had a moment of tears and grief this morning after realizing that - despite new treatment and a couple of symptoms improving - my baseline energy level has been cut severely in the last few months.