Help.

Reagan

So the past 3 days my breasts have been very sore. This morning when my SO and I woke up we both noticed my boobs looked bigger than normal. They feel bigger and are heavier, and are still sore. My period is supposed to start in 4 days or so, but we also had sex around ovulation time. We both read that some women hit another growth spurt in their breasts, up to the age of 20 and I'm 19. I have a daughter already, and don't remember this at all.