Help please... Kinda long

Ashleigh • FTM to a beautiful baby girl born January 17th
Okay so my LO is now 4 days old and I'm not even making the colostrum anymore... She was doing good on latching but then keep slipping off because I have a lot more boob area than she can fit. I had to give her a bottle yesterday because she wasn't having diapers. I'm okay with that but I do still want to give her breast milk. How can I get my milk to come in? I still make her do feeding a and we constantly work on the latching but I do have a pump and if I need to just do that I'm fine with it. Any advice?