Good day. Last month, my period came in a week early (June 19, 2017) though I'm on a 28th day cycle. On the 29th day of my cycle (July 17, 2017), my period didn't came and I had protected sex with my bf on the same day (he pulled out before ejaculating even with condom on).

After this, I'm expecting my period on the next day (day 30 of my cycle). But it didn't arrived. I'm starting worry. Not it's already been 8 days (July 24, 2017) and still no period. I'm very worried now. Please advise .