Pelvic area spasms

So I had my last baby two and half years ago just started taking up working out to become healthier and I started doing lower body lift where you put your hands under your butt and lifts legs off floor targets the baby pooch stomach area and well it's been about 7 days since I continued them because is started noticing muscle spasms under my c section scar comes and goes sometimes lasts for hours... Has anyone ever had that happen or does anyone have any idea what it is...