Mine didn't come In until day 5-6 and I've been dealing with low milk supply issues since. (I'm now 3 weeks pp). I've tried everything to increase supply so some things you can try are: drink mothers milk tea, hot compress, continue nipple stimulation via breast feeding or breast pumping, eat oatmeal or lactation cookies, drink a hoppy beer, take fenugreek, relax and rest. Not sure any of these work for getting milk to come in or if they're just supposed to increase supply.
If this is your first it takes longer for milk to come in. I'm a stm had a c section which causes milk to take longer to come in. Mine didn't come in until day 5
Re: How can I help my milk come in?