My period is supposed to come on the 25th of December, my last period was on the 25th of November and they usually last for 4-5 days. I recently had sex on December 17, and be been scared lately and overthinking that I'm going to be pregnant. My boobs have been sore lately, I don't know it's because my period is about to come or something else, I don't feel nausea or anything i feel perfectly fine. I'm 16 years old and my mom doesn't know that I lost my virginity I don't want to tell her now because she will be disappointed, I need help please