Is oral sedation sufficient to perform Tumescent liposuction surgery when the patient has a very low tolerance to pain?

I had tumescent liposuction done under oral sedation only. I told the doctor I had very low tolerance to pain; he told me the 4 pills he would give me (2 valium & 2 narco (? - spelling)) would be sufficient. I asked if more oral sedation could be given during surgery if needed & he said yes (he gave me 2 more valium during surgery which did not help). I was told 7 liters of fat would be taken (stomach); only 1 liter was taken. He stopped the procedure because I was in too much pain.