Working out real hunger from these hunger is a major learning for us all. Takes time though to work out which is which. Unfortunately you won’t get proper or true signals about hunger, fullness, etc. until you are fully healed (about 6-8 weeks) cause all of the nerves that were cut during surgery. As someone arise who really ‘ate’ two meals a day in the beginning, I too had that dizziness or wooziness, ensure up you have something before you do anything active. It will help ward if possible hypoglycemia episodes too. You may find too that your blood pressure drops which will make you dizzy, woozie or light headed, doughy in the head, find your vision narrows (lasts a couple of seconds) or at worst you may faint. Try adding an electrolyte powder to your water or take an electrolyte drink with you when you’re more active. It will give you a boost. I found it very helpful.
For most people none of these things last once you are eating more regularly, eating a wider range of nutrients and are eating a little more. I’ve always had a tendency to low BP and had random episodes of hypoglycemia. Since surgery they’re more frequent. (The low BP is an every day thing now.)