Had BBL 6-30-2017, last month my left buttcheek has been hurting me so bad it hurts to sit, should I go to the hospital?

I had a BBL 360 lipo 6-30-2017 within the last month my left buttcheek which is smaller than the right has been hurting me so bad it hurts to sit feels like a hard throbbing pain when I squeeze it it feels a little better but it still feel like it's a knot but can't feel the night if that makes sense what should I do in Bears to go to the hospital because of the surgery I had done