I’m terrified my old c section scar with open as my tummy grows :(

I think I’ve scared myself silly.... It’s 2:00am and I’ve been googling 😞 not smart I know. I was so calm but suddenly I’m overwhelmed with fear. Can an old c section scar open during the second pregnancy as your stomach grows?? Is a second c section more painful?!? My first c section was an emergency but I want my second one to be planned (if I can) I just wanted to know what people thought of them. And if they heard of any extra complications during their second pregnancy after previously having had a c section? I’m so scared all of a sudden :(