<s>[INST] i have sever stomach pain. the pain is right where my rib cage comes together its like someone is stabbing me with a knife and going right upwards. i am feeling light headed and dizzy i am extremely weak. i can t stand up straight. iv been looking on the internet and everything is pointing to my gallbladder . can you please help. [/INST] Your description is not clear - is it on the right side under the ribs? Or right under the rib?... Most pains abdomen start in the middle line and shift subsequentlyUnder the rib cage and right side. Going back to shoulder or shoulder blade - may be gall bladder it is in the pit of stomach - rib cage comes together and going up, it can be from heart also. Unless the pain is very severe, there should not be light headdress or dizziness. There is no mention of your age or gender should SEE A DOCTOR AS SOON AS POSSIBLE.  You need an ECG to check the heart.  You need blood tests - for heart, stomach, liver and so on.  Delay could be dangerous. Take care Good luck </s>