Pregnancy scare

Hi! I was just wanting to know the chances of me possibly being pregnant. Me & my bf had sex on the 21 of this month.. I ovulated on the 18th.. Well when I got in the shower on the 21st (before the deed) I noticed  stretchy cm.. When we did the deed, he was halfway inside & he pulled out.. When he pulled out clear stuff was coming and then white stuff followed. On Tuesday I  lwent to wipe and it was a dark brown lil line (I usually have brown flakes when I wipe & irk if this is associated with my regular cm to) when I noticed that, I was due for my period in 8 days.. I haven't noticed anything else, I feel perfectly fine with the exception of me having a cold. I do have bronchitis & I also work in a daycare as well. My cervical mucus is dry, I'm due for my period now in 6 days.