Quest...?

Pamela • TTC #1!
Ok, on 7-8dpo I got a pretty clear frer bfp. I got 4 bfns after that. (Tested the following 3 days after the bfp) So I assumed it was a chem preg. Now I'm 5-6 days late (rarely happens) for AF.  
​Any thoughts? Here was my bfp 7-8 dpo. Was this a chem pregnancy?