HI, Im ally, Im 19 years old, 5 2' and weigh 109 lbs. I must first say that I do not want to lose wieght in any way, in fact, I have been trying to gain wieght for the longest time. I used to eat all the time in order to gain weight, but about a month ago, these symptoms started to occur. After I would get finished eating, I would vomit evrything I had ate during that meal, I didnt really feel nautious, it just comes up directly after eating. this has gone on for the past month or so and I am very concerned because I am starting to lose weight, and eating is something I love to do, but sometimes I will eat and be fine, I work a 3rd shift job, and when I eat there I do not vomit, could it have anything to do with eating at night, rather than day? it sounds crazy, but if I eat when I wake up at around 3 in the afternoon, then I almost always throw up, but if I eat at work in the middle of the night, I am fine. I have been to my doctor and they did blood tests and I also had an ultrasound done on my galbadder and said nothing is wrong. please help me understand this, thank you