Irrational fear

I had a section over two years ago with my first I'm 18w pregnant with my second and I have this irrational fear that the c-section scar on my uterus is going to open up while my uterus is stretching and I'm going to bleed internally I know it's completely irrational but anything's possible it scares the shit out of me. Anyone else have this thought or can make me feel better?

This baby will be a c section too. Just worried about it happing during pregnancy.