Major stomach pains throughout today. Help?

Could it be serious? I was fine when I had my tea yesterday which was just pork and sweetcorn with a bit of rice, I only et the pork and the sweetcorn, they were definitely cooked. I was really hungry at like 2am though that night and my stomach was really aching, so I went downstairs and just had some brown bread and butter with some milkshake, and it worked.. But now this morning I had some cereal at 10am because my stomach was hurting again and throughout the day it has been hurting, I feel hungry yet I feel full? and I've just had some more bread and butter for now with a little bit of snacks.. Could my stomach be ruptured or something?