test darker than control line

how many dpo were y’all when your test line turned darker than your control line? i had a mc june 5th just a couple days before i turned 5 weeks. i took an frer a couple days before i started miscarrying and it was the best line i got out of all the frers i took but it was still only a vfl. i’m pregnant again, 4 1/2 weeks and my frers have always had STRONG lines!! hoping this is a good sign. my test and control line were the same color starting at 15 dpo with night time urine. today i’m 18dpo so i took another first response, i think the test line might be a smidge darker than the control but not obviously darker like i’ve seen and hoped for. does this matter?