Csection scar/vbac

Alexis
Hello, I was wondering if any mommies here who like me had an emergency csection with their first and are wanting to try for a vbac or have done both? If so, the last week I've noticed that on the ride side of my scar, it is kind of sore and hard. Is this normal? Should I be concerned? Will it affect my chance of a successful vbac?