Starting weight 273 currently on liquids finding it hard to get all my protein

I had my surgery 6/7. I am also having a tough time intaking all my protein. I feel full so quickly. I'm lucky to get 75% in and certainly there is no room for extra fluids. I'm also still having a lot of pain. I push myself to walk hoping it will help but it hasn't so far. I'm keeping my head up though. Everyone keeps saying it gets better.

i had mine one day before you yesterday was the first day i got my fluids and protein in i do 16 oz soy milk and one scoop chock truffle protein powder 37 protein it may take a long time to drink then i do another 23 protein powder in water which gives me the drink and protein my left side hurts i only try to take one pain pill a day if i really need it i too try to walk and it will get better