First of can blood in urine cause a false positive? My period was set to start on the 17 on the 15 I started seeing spotting pinkish very light only in the morning , 16 it was more red but not bright period red and mild cramping and it lasted till the 18 and stopped now I have brownish spotting. I read that blood in urine could not affect a pregnancy test but I’m not sure 🤔 I think it could have been implantation and can help please I took two test first response is positive and Walmart cheapie neg