A pinched nerve, eoe! Ouch, that sounds really painful!
Buy the most comfortable (for your condition) sofa you can afford! You're worth every cent!
And yes, I must confess, I hadn't thought much about the wonders of a toilet in the home until the damn thing went kaput! Let me tell you, I was
ecstatic when the new cistern was installed & working, something like 24 hours later! It was like all my Christmases had come at once!