Hi I Always Get Gas Easily So I Try To

Hi
I always get gas easily so i try to eat on time but sometimes I mess up with that. Also I have bad period pain. I am from a warm country but currently I am living in a new country. Recently the climate start to change, it is getting colder. Over two weeks before my period I start feeling cramps and i caught a cold/flu in addition to the cramps. my period came weekend and I also mess up with my eating. now my belly is hurting me real bad, i am also vomitting with diarrhea and i do not know what to do.
i was taking a cold medicince with bufferin
and when my period started i stop taking them and take straight bufferin 200 mg pain killer
friday i had my regular meal
fish and rice for breakfast and lunch but cereal, yogart and jello with fruits inside it for dinner
saturday i had oat porridge for breakfast then chicken nuggets and french fries at 4:30 for lunch and oat porridge again for dinner
and oats porridge all day sunday