I had sexual intercourse around December 22nd, 2017 in the morning. I took Plan B One Step the next afternoonish, around 3 pm. After 2 weeks, I threw up only once. I still have occasional nausea, mostly at night. My breasts are sensitive. I only got dizzy once or twice. I just got my period January 24th, 2018. It started heavy and now January 25th,2018 it’s really light. It’s still the color red. Is it possible I am pregnant?