Ok so three weeks ago today I started getting really nausea and finally I got sick. After that day it comes randomly. I get headachs, lower back pain, my feet and knees hurt when I stand to long. Also I keep getting cramps randomly to and have been for three weeks and my period won't come till next week. I can either eat two bites of my food and will start feeling sick or I won't be able to eat anything and sometimes I won't be able to eat enough. Any ideas?