I am currently on day 19 of my cycle. I had my cervical mucus on days 13-18 which is normal.However since day 15 i have been feeling extremely sick and had headaches which isnt normal for me. Its like a cross between hunger sickness and travel sickness. I am constantly feeling hungry and sick even after eating which isnt normal. I have just started ttc and have had sex during my fertile days. Im just wondering why the nausea.