Bleeding at 33 weeks..

I went to the bathroom to pee and change into sweatpants. When I wiped, there was bright red blood all over the toilet paper (I didn’t think to take a picture.) I waited 30 minutes and rechecked but no more blood. Should I wait it out and see if anymore happens or just go in? My mom is an RN and she said it could just be ligaments stretching. Any advice welcomed!