Is it possible to vomit up food eaten 18 hours before hand?

I had 4 peices of small shrimp out of a Chinese dinner. I had no problems for two hours. Then I tried to drink something. This made me vomit. It felt like my stomach was still full. I took a pepcid ac and went to bed. For breakfast I had 2oz of yogurt. My stomach felt a little funny. Well 2 hours later at Walmart I threw up and there was shrimp in my vomit--trust me on this one. It used to bother me but now it is a part of my life. Is it still possible for food to be vomited 18 hours later? I know this subject is not a fun one. Maybe I will never be able to eat meat? Maybe I have an ulcer? Maybe someone will be able to help me? I had a Small Pouch Gastric Bypass on 3-7-00. Started at 320 and now am at 253. 67 pounds gone in eleven weeks. I feel good. But now I have gone from a love relationship with food to a hate relationship with food. I don't want to eat because I am not hungry and if I try something new I will probably get sick. My Doctor had me on soft liquids for 9 weeks. Thank you for any help that is given. I love this site. Usually I am just a spectator unless I have experienced the same. Thanks again, Judy.

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