Gassy baby 😞 anyone.

My 11 day old has been so fussy lately due to gas. I've tired so much from bicycling her legs, burping, gas drops etc. when she gets fussy she'll scream for about 10 minutes then makes faces, turns red etc. she's strictly breast fed. She has been pooping. At times a lot other times not a lot of poop. She does pass gas and burp. Tonight my husband suggested that she can't tolerate my breast milk. That killed me. Does anyone know if I could be the problem? I've been watching my diet since noticing the fussiness.