I have 35 day cycle/1st day of my last period was on 11.8.20/i had un-protected sex on 11.18.20, no ejaculation inside, only pre-cum and i took a plan b within 3 hrs/light spotting + heavy red flow 11.23-26 / neg test on 12.4.20 / take another test?

Pregnant ?'s: Any semen, even pre-ejaculatory, can contain sperm, and pregnancy is possible. "Plan B" decreases the chance but is not perfect. To be certain about pregnancy, obtain a serum HCG test in about 5-7 days. Bleeding can occur just from taking "Plan B" as the drop in estrogen when Plan B wears off can produce withdrawal bleeding. Ask you gyn physician about low dose oral BCP's.