4 days postpartum, need help and advice!

Lauren • 30, Married, Dog Mom, first baby on the way! EDD March 8, 2016
My daughter was a feeding champ the two-ish days in the hospital and I was able to soothe her and nurse her just fine. 
We are home now and she's not wanting to feed as much, cries for two hours at a time and is very fussy. 
My milk just came in and I can't get her to feed. I know she's got to be hungry and I think she's overly tired. 
I guess I'm just looking for support and advice. This postpartum thing is a wild, emotional ride and I'm finding it hard to cope with not being able to feed and soothe her more easily. Any advice is welcome! Thank you!