9 mo still throwing up formula..

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Okay mommies! I have a question, my 9 month old is still throwing up his formula. It’s not a lot but it’s frequent. It can even be an hour after he eats. Sadly due to my work schedule I wasn’t able to take him to his 6 & 9 mo appt to ask his doctor what can we do. Have you experienced this ? His god mom told me to start him on whole milk because her son was doing the same and it stopped after she switched...i know I need to talk to his doctor but just curious on anyone else’s experience w this and what you May have done