You are never too late for healing/improvement. It sounds like you never have taken enough time away from stress and activity to allow healing to take place. As has been said many times before, healing is a marathon, not a sprint or series of sprints. Recovery is measured over many weeks or even months, not a few days or a single week. A good day or two is not a justification to return to activity. It is just a sign that things are starting to head in the right direction.

You are still over-thinking every little detail.

I wish I had advice to help you stop over-thinking every little detail. It is something you will need to figure out.

My best to you.