Weird pain should i go 2 the doctor? or is it stress?

lately i've been having a cramping pain like on the top part of my ribs but in the middle, and its not heartburn. i've been going through alot and working like all day every day. from what i can remember i've had the pain since all my problems started... i just want to know if its bec of stress or could something be wrong with me so i can go 2 the doc