Implantation bleeding for pregnancy

Patient: I had my last period on Nov. 2nd. So I figured I ovulated on the 15th. I had sex on Nov 13, 15, 16, 17, 18, 19, 21, & 22. A couple hours after sex I used the restroom. When I whipped there was light pink blood on the tissue. On the 4th wipe no more blood. I have a 30 day cycle. Since that day I haven’t seen no more blood could it be implantation? I don’t expect my period till next month. When should I take a pregnancy test?

Symptoms: None

Doctor: Hello,Thanks for contacting askthedoctor.comGiven the history , the likely cause of light pink bleed on the tiss ue could be from fresh vaginal abrasions or any preexistent cervical ectopy, which may have freshened becaus eof frequency of intercourse. The possibility of implantation bleed can well be considered as it occurs from 6 days after the fertilisation , but its also accompanied by excessive cervical mucoid discharge and softening of cervix.However , pregnancy can be confirmed definitively with a urine pregnancy test done 7 days after the missed periods. But a serum beta hcg test may be done to look for high hcg levels which indicate pregnancy and trophoblasts proliferation from day 22-day 26 of cycle.I hope i have answered your queries in detail,wishing you good health ,regards