Hi I am 20 years old, and had sex with my boyfriend at the start of this month and then again a week later, we used protection and there was no breaks in the condom or leaks, he didn't enter me without one on. My period is two days late, but I have a very irregular period and sometimes don't get one at all. I have had mood swings, sore boobs and very tired, also eating a lot, but still no sign of a period. I am trying not to stress out too much as I know stress may cause your period to be late or stalled but I am starting to freak out and get concerned.