Help, 11 DPO/12 DPO and 13 DPO!

I feel like the faint positive it on the bottom at 13DPO but I’m worried- is this bad “progression” or is it just the start? Worried about a chemical but wondering if Im just getting ahead of myself. Had a MC in November so obviously very worried! Please no mean comments! Period is not due until Sunday!

Thanks ladies!