I had Sex with my boyfriend last November 17 and until now I'm delay..
My last period was October 15,

I haad Pregnancy test last Friday November 29 and shows negative result.. is there a possibility that I am pregnant since I don't have my period yet?

Yes every possibility.

But intercourse not happened again.. why is my period not coming until now?

Your period hasn't come or it was just late? I am confused.