The chances of pregnancy?

Hey I did something really irresponsible. No smart ass comments I know I know better but it just happened alright. My man came inside me. I started birth control a few days ago and I took my 5th pill today. My discharge did not look fertile which is clear and slippery,...it was thick and white-ish so I don't think I was ovulating or anything. And I slipped spermicide film inside before we started having sex as well. Should I take plan B just in case of do you think I have just enough BC in my system to prevent ovulation. I will take a test in a few days bc I know it would take a while if I were to become pregnant. I think I ovulated like over a week ago but my period never came when it was supposed to cuz they are very irregular and I haven't had unprotected sex before last night so I know I didn't miss a period bc I was "pregnant"