<s>[INST] I'm 14, i'v been having pain in my upper right and left chest almost symetrically in the same spot. I've been having some trouble breathing mainly at night. I've had an EKG, echo, and chest X-ray which all came back normal. Now I've been having some blood in my stool the last couple of times i went to the bathroom which I haven't been to the doctor for yet. This may be totally different from the chest pain but just wanted a different insight. I haven't been feeling any weird bowel movements or stomache pain either. [/INST] Hello dear , hiWelcome to Healthcaremagic.comI have evaluated your query thoroughly .*  This seems in relation with low hemoglobin most likely  where you will     get  normal  EKG , echo and x-ray chest .Hope this will help you for sure .Wishing you fine health ahead .Regards . </s>