Diarrhea, Vomiting, Severe stomach pains, HELP

last night i starting feeling kind of sick, my stomach felt very delicate and i had diarrhea. Then when i went to bed, i woke up in the middle of the night with sever stomach pains and i vomitted. at this point i was also having diarrhea.i am still feeling really sick but it has gotton a little better. i was thinking that it might have been food poisoning, but i ate the same thing as some other people and they are fine! what should i do? should i see a doctor? help!