I need some advice please as this has never happened to me.

I am currently 2 weeks late. My last period was on the 28th of November for 4 days.

I ovulated on the 14th. Had sex on both 13th and 14th and 17th.

I was due on my period on the 28th of December, we’re now 11th of Jan and still no sign of my period. I have never missed a period other than when I’ve been pregnancy twice with my children.

I had a blood test today. Really don’t know what’s going on.