pregnancy

yesterday was the last day of my fertil window. my BF and I did it without any protection. and I'm not on the pill either. the method we use is the withdraw method. when I went to the bathroom after, there was a sticky jelly like white substance in my underwear/pants. I asked him if he finished in me, he said atleast half went in his pants and the rest either went on me (not in me) or on the floor. do you think there is a very high chance I could be pregnant??