I'm 18 years old and I started getting sore breasts after I turned 18 on Oct. I never had them before or anything like cramps etc, my only sign was bloating. That same month two weeks passed and I had really sore breasts that I would walk and it's hurt or even trying to put my bra on or my blanket. It followed with tiredness, mood swings and so on. Is this normal because the month of my period due I was late for my period and ever since then my menstrual cycle has been out of scheduele when it was always on time. Right now I have sore breasts for almost 2 weeks.

Pregnancy will do that but so will ovulation. Its also common at your age to have erratic cycles and hormone shifts. Maybe you should make a doctors appointment for a proper exam