i have never taken the MAP but i know that bleeding/spotting is a normal side effect. Every woman who takes it reacts differently to it some bleed alot some dont bleed at all.
i highly doubt that you would become pregnant from this because you took the MAP in the right time slot.
like the other poster said you can look up stuff about the MAP and when to expect your next period online because like i said i've never taken it.
and keep us updated