I have another question. So my husband also has physical disabilities, his back, shoulder and knees from being airborne, I have now noticed that prior to the episodes his disabilities become almost debilitating without doing something to make them worse. This time it was his back. I know he has pain everyday but usually manageable unless he does something like lifting heavy stuff. Weeks before he left his back became so bad he could barely walk. Last time it was his knees. The time before it was his shoulder and when we would go to bed his arm would shake. Is this normal?