Vvvfl........ and bfn on Asda digital????

Chelsea • Was ttc for 8 months had an ectopic pregnancy in march had my left tube removed didn't ever think I would be able to get pregnant again. I had a Mc 7/09/17 I got caught straight away #3 🌈👼👼🙏🏻👶🏻 due 12th may 18 💖

Could this be a chemical pregnancy? I'm currently around 12 DPO ..... the lines are so faint shouldn't they be a lot darker 😩