I'm 19, and lately, my breast have been very sore and tender. What is it from?!

I'm 19, and lately, my breast have been very sore and tender. What is it from?

I was thinking maybe it was from my period, but its not due until about 2 weeks. and they were sore last month too. if anyone knows why.. or what it could be from, let me know plz.

Additional Details

and its not from salt, i stay away from that.

could it be becuz they are still growing?? my husband said maybe thats what it is.. cuz he did notice a size difference...

sore and tender breasts are a red flag for pregnancy. Just because you have your period doesn't mean your not pregnant. I'd go to your doctors to check for any other health problems.