Wanted to add, how did you hurt your back this time? Are you taking anything for the pain? If you haven't already try a heating pad. If you are laying down put a pillow under your knees and if your laying on your side, put one between your knees. Back pain is so awful and I have wayyyyy to much 1st hand experience with this issue, so I know how miserable it can be. I can't have my sissy in pain so I'm saying an extra special prayer for a speedy recovery.
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Maybe I should have Sam pray for you and sing a song for you as well
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Also don't lay in one position for too long. It may hurt but try to move into another position like every 15-20 minutes while you are awake.