Recently I’ve bern experiencing weird problems with my stomach - I feel hungry while sitting/lying down but feel full and bloated when standing. Usually after I eat a meal, I do feel full whilst sitting but about 30 mins - 1hr later my stomach feels almost empty and will start rumbling and I would stand up to make sure I am full. Before this I used to get really horrible hunger pangs where I would feel consistently hungry no matter how much I ate and would feel faint if I don’t eat. But suddenly my stomach has turned from being always hungry to being hungry when sitting down. Bear in mind that I am 22 years old and do have anxiety (I understand anxiety can affect your physical wellbeing but just curious to know if there are any other ideas to this).
I would see your doctor and ask for an endoscopy.and abdominal ultrasound.
22 an hungry like this is strange but i hav same issues an am 43 i drink lots of water but do chk it out. When last u had a worm out? That can help aswell