Gassy baby

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My baby girl is gassy constantly and I think this is why she’s not sleeping well at night and fussy frequently.....

She is breastfed and I’m wondering if it’s something I’m eating or a dairy allergy. I stopped dairy awhile back for about 2 wks lee pediatrician and didn’t notice a different so I’m back to eating dairy. Is there any other foods that can disrupt baby or cause this behavior? Thanks ladies!