Why is it so light?

TW: miscarriage Hey all, I just took a test and I’m pregnant! I’m so excited because I had a miscarriage in February. But I’m a little concerned. I’m 4 days late on my period, and the line is so light (pic on my profile) Shouldn’t it be darker? I’m 17 days DPO and with all 3 of my pregnancies (2 living) they’ve all been dark by this time. Is this cause for concern? Is there a plausible reason as to why it’s light? I track my ovulation so I’m not sure if I ovulated earlier/later. Please someone calm my nerves and keep me in your prayers. This baby is so wanted. TIA!