Okay, so I had sexy three times during my highest ovulation's. Oct, 19th-21st. The next following day I had cramping that on the 22nd until 2-3 days ago it stopped. Now I feel pressure in that area. According to the app I was suppose to start my period yesterday but last month my period started on the 6th. I am scared, I really don't want my period to come! What is happening?