So my "period" was about 4 days late. I started spotting and then boom enough blood for a tampon so yesterday I realized my boobs are really sore. Not even like tender sore they hurt. My nipples hurt.. Could my 3 day "period" have been break through bleeding? I did test the day my period was due and got a negative but now I'm wondering if this constant headache has a reason behind it. Anyone experience something like this?