I need help

I exclusively breastfeed my two-month-old daughter and she cries so much and she passes gas so much and yes she is colic I need to know if she's lactose so I'm asking anybody somebody please give me a list of any and every single thing that has dairy in it so I can cut it out and see if it makes a difference because I am so tired of hearing my poor baby cry and it is starting to become way too much for me to handle and I feel like I'm going to fall into depression I am a first-time mom so I am new to all of this and please no sarcasm