Anything advice from other mothers 😓

So my month old baby has been crying a lot but only in the night when we’re trying to put her asleep plus I can’t keep on her schedule throws me off to much so anyways I feed her 2 oz every 2 hrs but she keeps asking for more! Am like ok just one more oz then when I give her the oz she still wants more! 😓😓 so she hungry I give her 4 oz that’s when she kind full I feel like am over feeding her but she dosent give signs that am over feeding her I feel like a bad mother even for my first baby 😓😓 plus her doctor said that giving her 4oz will make her over weigh when getting older 😓 help plz!