This is embarrassing to ask, I am 43yrs old, my cycle us usually 25-28 days,suppose to have me pms on Dec 28th but spotted a few hours a week before that and then spotted light brown/ pink again the other day. Been sensitive to certain foods and smells I am usually okay with, lower backaches for several weeks, always feeling like I am starving even after I ate, took 4 HcG tests, all negative , nipples are darker and when squeezed, a little milk comes out. I am confused to why I am feeling this way. Help ! Is this natural ?