I'm female & I'm 20 years old & I've been nauseated , but not as bad as it's been this month. I get nauseated all the time , try to eat something , but then I throw up. I missed my last depo shot. The last depo shot I had was on March 31 , 2016. I've also been getting really tired & getting headaches & having some stomach cramps on and off for at least a month now. Am I pregnant or just sick? What's going on with me?