A caregiver's work knows no sick days

I am made to realize that there is no escaping being a caregiver 24-7. When mom and I took my dad to his physical therapy yesterday my gut ached, all I wanted to do was curl up and hug my belly with both arms and not move. That not being an option I went down to the physical therapy place and pretended like my gut was not hurting so bad I wanted to cry. Today it is still hurting, particularly when I stand up. I'd love to spend all day in bed, but that's not an option. Just wish I knew what I did to make my gut hurt so bad, then maybe I'd know how to make it stop hurting.