My fiancé and I had sex for about ten seconds and then we got nervous about getting pregnant, so we stopped. He didn't go at all, but I'm a little worried that the preejaculate could cause pregnancy. 5 days after we had sex I started having light pink spotting and then a darker brown color. Im supposed to start my cycle in 4 days. I'm also sick with a cold and have been running a fever and taking an antibiotic. Could I be pregnant or could the illness be throwing my cycle out of wack by a few days?