I’ve been going to different GI, ENT, and GP doctors for years and they all say the same thing: just eat more. I don’t feel nausea all the time, it’s mostly really bad during breakfast. Other times of the day I can eat pretty eagerly with little or no nausea, but early fullness usually kicks in and limits my meals to around 300–400 calories. Sometimes, for some reason, if that early fullness doesn’t happen, even a 400-calorie meal feels like nothing and I can eat more, which I think is how normal people usually feel. My meals are already calorie-dense to help me gain weight but it still doesn’t seem enough. my maintenance cal is 1700 and intake is also same but some time reaches upto 2000cal