why do i always be sick after food and drink why do i have this bad cough and dizzy blood in flegm?

I am 17 years of age and I have this really bad cough to where there is sometimes blood in it or it is just flem on it's own............. and I eat or try to eat and I bring it back up............. it is the same if I drink i always bring that back up and I keep having bad stomach aches and pains.......... and i get bad chest pains and I keep feeling dizzy and sometimes my hands and fingers go tingly................. and sometimes my vision goes blurry and I cant see for about 15 to 20 seconds then my vision will come back.................... this is happening to me every day for the past week what do I do ???? can any of you help me please ????