Gallbladder removed 4 weeks ago due to acute cholecystitis. have constant right side flank pain and pain under right rib cage. is this normal healing?

Almost too long: You could have pain like that from fluid or a small amount of blood that accumulated inside your abdomen. If you have fever, then you should followup with your surgeon. If not, you could follow if for another week or so. If it does not improve, you need to see your surgeon.

Too long: You should have completely recovered from your surgery by now. See your surgeon now.

Unlikely: Did you have a laparoscopic or open removal of the gall bladder. If open, normal post-operative pain where you describe could still be present. However, it is more likely that you had the gall bladder removed with the scopes. If so, you really shouldn't have any more pain there. Were there any complications? Do you have any other symptoms? It's difficult for me to help more without more info.