Lower abdominal pain near c-section scar :/

Im 36 weeks and 4 days with my third baby(birth control fail, definitely a surprise baby ❤️)my youngest just turned 17 months, I’ve had all my babies via c-section, for the past week I’ve been having lower abdominal pain on and off close to where my c-section scar is, it’s not the scar on the outside that is aching it’s the scar on the inside on my uterus, I worry about uterine rupture because I got pregnant so soon after having my 2nd, I’ve brought the pain up to my Ob but she doesn’t seem concerned…I have an appointment next week and I’ll be bringing it up again..has anyone else had this issue or similar pain.