hi, im 19 and my nipples are very very sore, even so that it hurts when my clothing touches them. they have been this way for about 2 weeks. i dont think i could be pregnant, and i should start my period in a few days. there is nothing visable. like no color change or anything like that. i have heard that they can be this way because of hormones, but should they be doing this for so long. help me!!