For the past few weeks I have been having extreme nausea, pain behind my bully button with stomach cramping and major headaches and fatigue where my eyes even burn from pure exhaustion. I am a 28 year old female I am not pregnant and I am generally in good health. I havea history of diverticulitus, epstein barr virus and ovarian cysts thats it. Any idea what this could be? I have also been experiencing a lot of stress ?