Lessara, it takes time to adjust! I used all the "allowed extras" and very large meals too at the beginning. Some more calories than a normal day! It is the timing that is helping the BG lower.
Fasting should not even be uncomfortable, and certainly not painful. I follow the alternate day fast protocol, eating a good, still pretty big dinner every night. The timing is helping my BG control, slowly losing weight is a side benefit. When I started IF the minute felt hunger, I would drink broth, hot tea, maybe some fiber too, used all the allowed extras on the IF plan. There are many ways to do IF but I am NOT into any suffering
and this has worked for ME.
After not doing IF for a few months and seeing high BG again, I recently re-started it and have been amazed how easy it is. Thought I would have to aclimate again, but from day one, no hunger at all. I was out of house most of yesterday, thinking how weird it felt, driving around, feeling great, no desire for even a tea. I used to use CO in coffee, but haven't this time, just cream. Broth at lunch,(sometimes with butter, not this time) tea in the afternoon, then a substantial LC dinner. If a social engagement interfers with the schedule, no worries, just adjust the timing. And due to the lack of hunger my eating day is often an 18-20 fast too, yet my calorie intake is not much lower than normal.