I thought I was only 6 dpo, my fertile window was last weekend and I had a Peak Clearblue digital opk on Sunday the 2nd. Took a test today expecting it to be bfn, I just couldn't wait. I had some cheapie tests. Had MC Sept 27 and AF Oct 23-27. I have short cycles. Also, took HCG test before last AF and it was totally bfn! What in the world could this mean? It's too early for them to be sooo dark!!