Needed to be stitched again

Has anyone else had a similar experience? I am 7 weeks pp with a second degree tear, and around 4 weeks I was having horrible burning / stretching pain. I went to the OB and they said I popped some stitches and the knot from the old stitch was rubbing against the open wound. They gave it more time but it didn’t heal on its own. I had to go to the OR yesterday and have all the scar tissue cut out and the old stitches removed. Then they restitched me. I’m in so much pain and so scared it’s gonna rip open again. I’m scared it’s never gonna heal, and it’s so hard to care for my baby boy with all the pain. Has anyone else gone through something similar?