Help! 13 weeks bleeding

I woke up his morning and when I wiped there was blood on the toilet paper. It’s was red/brown and seemed to be less and less as I wiped but now I’m panicking.

I had my NTS just yesterday and everything seemed fine. Heart beat was fine.. baby measured right in time..

I haven’t been back to the bathroom to see if it’s still happening and I am not experiencing any cramps or anything but I know bleeding is never “normal”.

Has this ever happened to anyone else?

And yes I will call my Dr as soon as their office opens.