How long will my face be puffy? 10 points help mee:(?

so i have a sever case of poison ivy all over my face and right eye. I went to the doctor and they gsave me a steroid shot around 60 to 80 mg around 2 days ago i think. and my face is still puffy. like my cheeks and when i look down i have this double chin (and im thin with low fat so it looks completely weird and REALLY bringng my self esteem down) so yeah, my parents said the puffyness went down some, however i still have this double chin and puffy cheeks..does anyone know how long this will last? im also on medication at the moment to help the poison ivy go away. antihystamines and something else to help with the itching.