Hunger pains but no feeling of hunger

Okay so this is really hard to explain, to preface I feel like I should say I'm autistic, and not taking any meds. I'm having hunger pains, despite the fact that I would have just eaten like..a couple hours ago. And all I did in that time was sleep, and even if it wasn't. Usually I can eat like..half a meal and be good for like four hours before I'm like "hey I should get a snaccy" or something. But recently I've been having hunger pains like I'm starving, I know it's hunger pain. But I don't feel hugry. I don't have the urge to eat, this could be related to another mental health issue. But for now I wanna know why else this could be happening