The nails thing is weird. I didn't have covid. But have had spinal, neck ,rib crushing pin since vaccine booster. My nails got really strong too. My pain was better 3 days ago. Then last 2 days was brutal. A lot of people have mentioned feeling better when they don't eat. I kind of go with that. I'll cut back to a tiny meal and a smoothy. Things seem to be a little better. Gets very sad after a good couple days, then it all comes back. Just thankful it's not as bad as January, not severe pain lifting my laptop.... 👍 Thanks for helping by sharing.