14 week pregnant . upset tummy?

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So, my nausea stopped toward the end of 12 weeks. However, every now and agin, i get a really upset stomach. Usually, its caused by eat a big meal. Before getting pregnant, i ate the usual 3 meal a day. Now , im one a small meal or snack ever 2 to 3 hour. Even with that being said, sometime after eating i feel horribke. The only thing that help is to lay on my bay and eventually doze off for an hour. By then my stomach settle down. If i dont do that, my upset stomach might last for hour. Any help with this ladies. today, my stomach is just so crappy!!😷😷😷