I had sex on October 6th, which is according to the calendar one of the days that I could have ovulated. We didn't use protection and he did ejaculate in me. I took plan b about 7 hours after the incident. Started to have mild cramping and ended up on October 11 having some light bleeding that lasted barely 4 days and was bright in color. My actual period was due October 23rd and it is now October 28th and I still haven't had it. I've been feeling very tired and nauseous lately and have zero energy. Could I be pregnant? Or do the effects of plan b still effect you 22 days later?