so i’m almost 8 weeks postpartum and i’m embarrassed to say me and my partner have been a little risky with intercourse, so i’ve been testing every couple of days to make sure everything is negative. every test has been negative except for the other day when i tested it was positive and i watched it turn positive, i tested again the next day and it was negative again. i’ve been having cramping and bright bleeding now ever since the positive test along with the now negative one and im thinking it was a chemical pregnancy, i called my OB and they said it probably wasn’t a miscarriage or chemical and was probably an evaporation line but i don’t think it was. i took some pictures of the test turning positive and then compared to the negative test the next day. does this sound like a chemical?