Need Opinions

Last Sunday 10/12 my boyfriend and I had unprotected sex and he may not have pulled out in time. The next day I began ovulating (per glow). All throughout my week of ovulation my CM has been a mixture between egg whites/creamy. Today I am not ovulating any more and my CM has a light brown tint to it and I don't start my period for another 12 days. I never experience spotting until a couple days before AF. Could this be a sign of pregnancy?