Why am I in so much pain after scar revision surgery when dr. said to just take ibuprofen?

After having a revision on the side flap bra strap fat that was done during my breast reduction five months ago due to puckering of skin, a chunk more skin removed and then stitched up, dr. said to take ibuprofen for pain, that pain would not be bad, I am hurting and throbbing pain makes me want to cry the day after. Is this kind of pain normal? Ibuprofen does nothing to help.