Brown flakes in pee

Sarita

Hey everyone I was wondering if anybody has had this happen to them I am 21 weeks and 5 days and this morning i used the restroom and i smelt a foul smell but then after going again the smell went away then I started receiving cramps and i had the urge to pee multiple times while this was happening i was getting shivers and i got the urge to pee again and that is when I wiped and i saw pinkish on my wipe and i saw brown flakes in my pee… can anyone tell me what’s wrong?