I'm not supposed to get my period until this coming Sunday. Last night my boyfriend and I had sex but during I was getting the feeling of period cramps. After we had sex, there was no blood or anything. This morning when I woke up, still nothing there and the cramps had gone away. As soon as I got to work, went to the washroom and sure enough, there's blood but it's not period blood. It kind of has a orange-ish tint to it and right now I feel like I'm going to puke or pass out. Anyone else ever felt like this? I don't know what's wrong with me =(

It is likely some blood mixed with the semen and vaginal discharge. As far as feeling ill, perhaps you are actually ill. Have you skipped any meal today? Eaten anything out of the ordinary? There can be a number of possible reasons for feeling unwell.
See how you feel over the next couple of days.