​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​could this be implantation bleeding?? I'm a supposed 9 dpo today. AF not due 10/17-10/18. I was constipated from 8 -9 dpo, had a strange tightening feeling in lower abdomen 7