okay so I was starving to death and went to cicis buffet and as soon as I got here I started feeling…

okay so I was starving to death and went to cicis buffet and as soon as I got here I started feeling bad and couldn't eat any pizza and I puked a bit. my lower back has been hurting and when my boyfriend rubs it it feels like I've been hit with a brick then stop with a knife.. could this be a sign?