Ftm here I'm 31 weeks pregnant I went to take a shower but had to pee first and when I whipped there…

Ftm here I'm 31 weeks pregnant I went to take a shower but had to pee first and when I whipped there was blood on the toilet paper at first it was a bit dark in color then it started to lighten up so I got in the shower and by the time I got out it stopped is it normal or what should I do? I haven't had any cramping I also have a doctors appointment on Monday.

****I'll post photos of the toilet paper in the comments****