I am a 40 year old female . I been feeling very tired, lightheaded, headaches, lower back pain, abdominal cramps, mood swings, forgetfulness and frequent urination for the past 2 and a half weeks. One of those weeks I also felt nausea. I began bleeding one week earlier then my expected period. It was heavy then stopped after 3 days. It s going into the 3rd week and still feeling exausted. Today I have been extremely thirsty too. I ve taken a home pregnancy test which was negative.