BFN and still no period

My husband and I have been trying to conceive for six months. I am a really good tracker or my period and ovulation. It is safe to say that my schedules are pretty regular. My last menstrual cycle was January 18th and I ovulated on Feb 4, 2019. At 9 DPO I was experiencing what I thought was implantation bleeding. Light pink in color, not a flow but saw some panty stain and more when I would wipe, and it only lasted 2 days the most. I was so excited but refrained myself of testing early. Day one of my missed period I tested and it was negative. I tested yesterday (4 days late) and still a clear negative. I would greatly appreciate any advice or comments regarding my problem. Thank you!