Gassy baby

My 15 week old has some serious gas. I have given up dairy and eggs because they seemed to upset her and had green loose stool. Even though I’ve changed my diet she still has a problem with gas. She passes gas a lot and screams while she’s doing it. I went to work for the past 5 weeks (decided staying would be best) so she was drinking from a bottle during the day. The Mam brand bottles are supposed to be anti-gas anti-colic. I just don’t know if there’s anything more I can do until her doctors appointment on the 30th.