Does next choice pill work?

So Friday night me and my boyfriend had sex without a condom and I'm not on birth control and he cummed inside me. Later on in the middle of the night we had sex again and he cummed inside me. I was sober and so was he it was just the heat of the moment we were feelin eachother and it just happened. I was really scared afterwards so the next morning I bought the Next Choice emergency pill. I took it within 12 hrs after the incident. This is my first time ever taking an emergency contraceptive and I haven't received any symptoms yet from the pill. Has anyone ever taken it? If so how did everything turn out?