For the past two-three days I ve had no appetite. I don t know where it could be from. I took vyvanse on Tuesday, Wednesday and Thursday. Thursday I ate two meals. And ever since my appetite has been slowly diminishing. Friday morning I was extremely hungry, but did not eat until 2:00, I did however eat enough Friday. Then Saturday I had pasta around 2 again, and then nothing until around 8:00..Sunday my appetite lessened. And since yesterday, Monday, I ve had no appetite whatsoever--it s completely gone. I was extremely nauseous yesterday, and today no real nausea but nothing sounds appealing and I literally need to force myself to eat..what could it be? Do you think my stomach shrunk?