Chronic condition makes it hard to babysit toddler

DEAR ABBY: I recently retired. I also have fibromyalgia, which leaves me fatigued and in pain, and I never know how I will feel on a given day. My daughter is a single mom of a 3-yearold and asks me to babysit overnight on occasional Saturdays so she can spend the night with her boyfriend. I love my grandson and love being with him, but sometimes it’s very hard for me to keep up with him. I’m in pain for days afterward from sitting on his level so we can play, picking him up and picking things up from the floor.