Going crazy !? Just indent catching the light?

Hey! So I would be 12dpo today approx - I have had bleeding for last 3 days (heavy for most implantation but light, browner and more mucus mix for me). The rational side of me says it’s a light period but I thought I’d had a period before my other 2 pregnancies (both mc unfortunately) and only realised a good week or two after the bleeding- so it’s hard for me to let it go now as I don’t want to miss again.

In natural light there looked to be the slightest line on this frer test but tbh I couldn’t see it in the photos unless I use filters etc. is it just the light catching the indent mark? Top picture no filters. Thanks all!! 💕