My fiance and I had sex on day day 12 of the month(June 7). It was unprotected, but he did not finish. My cycle for the last 2 months has been 30 days. I got my period on April 27. Now i have been spotting for 4 days (June 16-19). The first 3 days were like brownish, but now there is a light flow of red(lighter than my period). Am I pregnant? I do not want to be pregnant yet because I am too young(still in school). We are nervous that it could be implantation bleeding. Please help!!