I'm having upper right abdominal pain just below ribs. i've been having burning poops that leave my rectum and anus tender. i've also been very very tired. stools are thin and loose . what might this be?

You should see a doctor for further testing. You probably need to see a GI doctor to determine why your stools are loose and burning. Did this happen suddenly? Did something in your diet change? A GI doctor can test your stools and do a colonoscopy if needed to diagnose the problem. Treatment can be given once a diagnosis is made. Good luck to you!