Is Milky White Discharge Something To Worry About?

I recently had sex with my boyfriend and the condom fell off and was hanging outside of me when he pulled out. I felt cum running down toward my backside, and I took Plan B 6 hours later. The only side effect I experienced was a delayed period that was shorter and much lighter than normal (4 days). I m also on the pill, but a month prior to this incident I had taken in 6 hours later than usual during a weeklong vacation, then went back to normal schedule. I m afraid that my birth control might not be effective due to the schedule issue (besides that I m good about being on time to take it), or that Plan B did not work. Two weeks later I m experiencing milky white discharge, not sure if that s normal or if I could be pregnant