Suggest Remedy For Persistent Abdominal Pain, Diarrhea And Throwing Up

Starting yesterday as work was ending, i felt sick to my stomach. I tried to eat prior on my break, but i couldnt get it down. I hadent really eaten much and i went to bed with a major stomach ache. Durring the middle of the night i kept waking up cuz of my stomach and finally went to the bathroom. In the midst of using it i had to throw up so quickly got off, got on my knees, and began to throw up. As i did dark brown liquid was coming out both ends(diarrhea), i figured it would stop since i hadent eaten much and everything in my stomach was out, but i kept going, all liquid. It has stopped, but my stomach still hurts. Should i be worried? I assumed food poisoning but i havent eaten much.