Girls, can you tell me what to do? My daughter is throwing up a lot, s…

Girls, can you tell me what to do? My daughter is throwing up a lot, sometimes even like a fountain. She might fall asleep first, then wake up an hour later and start throwing up again. I give her simethicone for gas - it doesn't get any better. Every day the same story, after every feeding she throws up a lot, it feels like nothing is left at all. Although she has gained weight normally and goes to the bathroom well.