Hi so I took plan b on 11/4 I had unprotected sex on 11/2. Every since then my stomach has been hurting, with cramps and feeling like I have to throw up and I have lower back pains .Today 11/16 I have experience little drops on blood. Now I'm confused. I just obuvalted on 11/10 but I'm not sure if my system is thrown off due to be taking the pill