Early on at 2.5mg your levels are still building toward something steadier. Later, once doses are higher, the pattern can shift around. Right now at 15mg I see almost no consistent pattern at all. Sometimes I am starving two days before the shot and then have zero interest in food the morning of. I try to keep protein, fiber, and calories steady every day no matter how hungry I feel so I am not totally tied to the medication.
On which day do you notice a bit more hunger, the one before injecting or the injection day itself? Mine changes after going up to 5mg, where I seem hungrier on pin day rather than before, unlike at 2.5mg when I was ravenous the day prior.