Thank you, everyone, for your messages.
I revisited the post-op diet sheets provided by my dietitian and discovered that I'm actually supposed to eat even more than I currently am at this stage!
Rather than focusing on calorie counting, the primary goal is to prevent deficiencies, and they are confident that long-term weight loss will naturally occur.
Yesterday, I made a mistake by eating too quickly and consuming too much food (including 4 oz yogurt, 2 small toasts (see attached pic), 1 egg, and 3 oz pureed salmon and broccoli).
As a result, I experienced terrible abdominal cramps before bedtime. Today, I'm going back to a diet of liquids and yogurts only. Your mention of "staples rupture" did give me a little scare, but I appreciate the information.
Regarding water intake, I can manage to drink water, but swallowing is painful and creates uncomfortable air bubbles inside. So, I reckon I'm drinking around 500ml to 1 liter a day.
Thank you all for your support and understanding during this post-op phase. Your encouragement means a lot to me as I work towards a smooth recovery.