I had unprotected sex but did not finish....on the 18th. i am due for my period tomorrow. I spotted on the 24th and am getting a little but of yellow discharge today...Im worried the pre ejaculation may have gotten me pregnant but i think im not. i just need to relax but of course its always on my mind....what should i do?

Ok, I need help!! Quick! I had a period on October 1 and on October 31st. And everything was fine, but this month on November 17th me and my boyfriend had sex, unprotected. He didn't cum in me and was nowhere near to ejaculating. But I do believe he did pre-cum......my period lasts for 7 days. And I should be starting my period soon, at the end of the week. But I am scared, Ive been losing weight, and now I have white discharge....I haven't been cramping or anything, I did feel a little weak earlier. I get dizzy a little when I sit up too fast, but I don't know what to do. Am I pregnant???? My boyfriend and friends say Im not and only stressed out. But I don't know what to do!! HELP!!? PLEASEEE

And the sex was only 3 to 4 minutes long. I told him to stop.