The day after my last period (7 weeks ago exactly) i had unprotected sex with my bf but he didnt ejaculate. That night i went to take my bc pill, but i had lost my pill. I wouldnt be able to get another pack for atleast 4 days so less than 24 hours later i used a different kind of birth control i had at my house (Alesse, i used to use it) as a Plan b substitute. I took 4 pills then another 4 twelve hours later. I expected my period the 14th of December but it hasnt come. Ive had 4 negative tests, i took one yesterday. I have been feeling a bit nauseous and a couple headaches but no weight gain or other symptoms except a lot of watery/white liquid discharge. Yesterday, i had brown discharge for half the day and now i think it has disappeared. Im now late for 2 periods. Could i just be messed up from stopping birth control and using another brand as plan b (it can be used as that, 75% effective) all in one day or am i pregnant?