Oh sweety, Im sorry about the BFN and your previous losses. TTC is so hard isnt it. It is possible that it is too early if you only implanted yesterday (hence the implantation bleed).

I had an early m/c at 5 weeks on Wed / Thursday, so I understand how you feel. I wanted this month to be mine too, but my baby didnt make it :-(

Lots of hugs to you and I hope you get your BFP soon.