Dear Doc, My Last Period Was On November 3rd And

Dear doc, my last period was on November 3rd and my partner and I had unprotected sex on the 6 th and 7 th days of my period. On the 8 th day I took the emergency contraceptive pill unwanted 72. We have had sex on and off post this but always used a condom.

My periods are usually a one month one week cycle but sometimes it comes exactly after a month. So my period should have come on 3rd or 10 December but it is the 21st and it hasn't come yet. I took the I can home pregnancy test on 15th December evening and it was negative. Also, my last period was delayed by over a week as I was stressed regarding some exams. This month has also been stressful.

A week after consuming the pill, I developed dryness and itching on my thighs. I have no idea if its related. The itching still persists on and off. Could you suggest what to do? Do I have any reason to worry?