Bfp 6/7dpo?? Is it possible?!

Hey everyone! I'm currently 14 months into our ttc journey. I was diagnosed with PCOS in July last year only to find out i was pregnant in early August, I couldn't and still can't explain how happy I was. Sadly I began bleeding 2 days after my bfp and was told I was miscarrying the following week - we were utterly devastated. I still am today I started feeling crampy so, like the addict I am, decided to test..I got the faintest of lines so tested again and got another positive line but slightly darker. Is it even possible?! I think I'm only 6, 7 max dpo! 

Hoping but remaining realistic.. any advice greatly appreciated! X