Going crazy!

Hi moms soooo my daughter is almost 3 months she’s my third baby and she’s been the most difficult one. She literally does not stop crying I’ve taken her to the emergency room twice they just say it’s a phase or colic I’ve done everything to help her with my the colic (gas drops, gripe water, etc) I took her again to her doctors and they say she has acid reflux she’s been on the medicine for over a month now her crying has calmed down a little bit but she still goes nuts almost every night. I feed her burp her change her hold her/rock her idk what else to do I’m literally going nuts. Any advice!??? Mind you I’m a stay at home mom with a 1 1/2 year old as well my oldest is in school & my house is a legit mess cause I can’t do anything!!