Side Effect From Grecian Formula Is This A Side Effect From The Plan B Birth Control Or Am I Pregnant?

Is this a side effect from the plan b birth control or am i pregnant? - side effect from grecian formula

I took the Plan B birth control a week ago and then had my period. First, my period is was brown and then red and now raises brown. If I is of my time over, he returns. This is the 3rd Time in his party. Am I pregnant or is it simply a side effect?