What is this called? and How to get rid of This Sickness?

I woke up (8am) and felt really hungry my stomach was hurting really bad so i eat cereal then threw it all up. I had diarrhea all day. Everything i eat and drunk went strait threw me or i threw it up. MY stomach was hurting really bad. Then on the side, im about to start my period so i was having cramps. i finally went back to sleep and when i woke up at 4pm, i went to drink something and it didn't seem to come up our out and i also had some apple sauce and it didn't come out or up. But i still have that sick feeling. And my stomach still hurts (idk if that's cause my period coming or not cause of my cramp) and i still have diarrhea. Also when i get up to walk im ditsy and my tummy hurts. I really have no food inside me cause everything i did eat came up or out :/ so yeah what is this called. I though it was food poison. How do i get rid of this?