A week late with a BFN

Amanda
First month using preseed. AF should've showed her face 2/3. No signs of her yet. A week after ovulation I spotted here and there for a couple days. I don't necessarily feel cramping like I would when AF is coming. I just feel tightness. Other then that, I have no other symptoms. Took a pregnancy test and came out negative. Any hope? Or any of you ladies ended up with a BFP with a situation like mine?