Is there such thing as "fluffing"? When does it start after BBL fat transfer?

I just recently got a bbl 2 weeks ago and it seemed to be good and getting bigger as the days past however today it seems like my bum and hips have shrinked significantly and it's becoming stressful to think I spent the money I did and went through the pain I did to not end up with the desired results or somewhat close to the desired results, will I get bigger or is this it? I know they say wait 3 months but this is nerve wrecking.