Having to stop???

Due to recent medical complications I had to stop breastfeeding my 3 week old. I have just come back from the hospital and I am producing little to no milk at all. I tried to get her to latch on and she has no interest. It's also very hard after recovering from surgery with my incision and everything.  I cry every time I have to give her a bottle even tho I understand it's what she needs I am just devastated I myself cannot give her what she needs. Any advice?