Whats wrong with me....?

Well it all started at night when I had pains near my kidneys and lasted for half an hour. Then later i started pukiog, but the sick was coming out forcfully. it looked foamy and i only puked a tiny bit. Also the colour was sort of a yellow green. I have been sick 8 times. Its saturday today so i cant go to the doctors, shall just wait it out hope for the best or not? Thanks