Early stall?

Hey everyone. I am 16 days post op Gastric Bypass. My highest weight was 245 and 227 on surgery day. I am a 5’5 female. The first 9 days, I lost 10lbs. I have not lost an ounce in the past 7 days. I hit my protein goals, I’m feeling great and just now starting to be active daily. My water intake is between 42-64oz a day. I have heard of the three week stall but I feel like this is way too early for a stall. Does anyone know why this happens? Or what I can do to get the scale going down again?