I had intercourse on dec 12 2016, took the MAP 5 hours after. I never felt any cramping or side effects besides light bleeding for three days a week later (normal when taking the morning after pill). I was two weeks late, 4 negative hpts later and finally felt cramping. My period is light. It's there but not anywhere near its usual flow. I am only now experiencing feeling dizzy, fatigue, breasts swollen, freaquent urination. Can this still be side effects of plan b or am I getting false negative results?