I was consuming something other than water every 2-3 hours as per my dietician's instructions.... I didn't really think about calories, I focused on my protein goals, water goals, and "eating" frequently. I still eat every 2-3 hours, so about 5-6 times a day.
It sounds like you are progressing nicely!! Lucky you! I was on strict liquids for 2 weeks post op. Sounds like you get more things. I suggest broth or tea when that head hunger kicks in. Or a sugar free popsicle. I'd check with the guidelines your dietician gave you, often they want hydration focused on the most for the first few weeks, with protein goals a close second. Calories usually come in (if they come in at all) once you are on soft foods. But every practice is different!