Good line progression or am I having a chemical?

Christina

I thought I was in the clear but have had some light spotting the past couple of days. I went to my primary and she looked at my cervix, said it’s closed and doesn’t think it’s a miscarriage. But I don’t think the lines are darkening as much as they should be. Also I felt so sore the last two days with a headache and back pain/ mild cramps but today I feel totally fine so am wondering if my hormones are dropping? Has this happened to anyone before? I just want to make it to the 12 week ultrasound already and have a healthy baby 😭