What is happening?!

So i had sex with my boyfriend about a week ago and my period is currently 5 days late. Im 15 and my cycles have varied from 24-35 days and now its currently day 39.  He didnt cum, we pulled out, and also used a condom. I've been having this milky discharge for about 3 days or so and starting today it smelt like my period. Like a blood sent. Im wondering if this is normal and if anyone knows whats going on, sorry for the inconvenience but can anyone help?