CD47 - just come off pill due to thinking I may be pregnant.

Steph

Hi, I came of BC this week because my husband and I have decided we want to TTC our second child. However, we already wondered if I was pregnant before coming off because I had missed a couple of pills then my period didn’t arrive when it should so decided to stop taking the pill and see what happened. Currently on CD47 and no period still but I have had very light red/pink bleeding yesterday and today but only when I wipe. Could this be implantation or a withdrawal bleed? I missed the two pills two weeks ago so would be about the right time. Tested last week and it was negative but that was before the bleeding. Thank you!