6 days post op and 1 side of butt is bigger, longer. Any suggestions?

The dr did add fat to bottom of butt to build up and this is my second surgery I'm 6 days post op my right side of buttox is harder and bigger / longer I can't tell if it's swelling or its messed up. How will I know? How can I figure out? Another thing is wearing a full garment with the buttox out ok for after surgery ?