I had unprotected sex for a lil bit then used a condom. got worried took plan b next mornin. 4 days later seein blood. this is the 3rd day of seein it?

Spotting: It is common to have spotting a few days after taking Plan B. In addition, your next period may be lighter/heavier/earlier/later than usual. These effects are noted on the company website, and probably the package insert.

Bleeding: Potential side effects w emergency contraception include menstrual flow changes (spotting, bleeding, early or late period).