Is pain in my left buttock normal?

I am 25 days post op For BBL and Im feeling alot better around the stomach area and even my back. The only issue I'm having is pain in my left buttock like a cramp often now after the 3 week mark. I have started sitting now with pillows and such for support , could that be the cause of the pain? Is it normal to have numeral "cramps" in that area or just pain?