What is wrong with me?

sup all, im not really sure whats wrong with me, lately (yesterday) i have been experiencing constant headaches, wanting to throw up, and feeling sleepy(which isnt weird for me), my outings is also looks greenish after i take a poop... could it be that i have something wrong with my intestines and/or do i need more vitamins, because i havent been having a good diet lately, and have been putting on some weight.