Suse

I had my surgery two weeks ago. On first day home from hospital I was up 12lbs. I knew this was from all the fluids given in hospital. That weight was gone in two days. Then I lost 2lbs a day for three days. Then I have not lost anything and yesterday actually showed a pound gained. This has been discouraging but I have my post op appt tomorrow and hoping to get some answers. I do think I was not getting in enough calories even though I was getting in 70 grams of protein and 64 ounces of water I was still at only 600 calories a day. Has anybody else had this experience?