Went back to work for Ei hours

Courtney
When my daughter was only 6 months old because I got pregnant again 3 months after she was born and needed my hours for Ei mat leave again. 
My husband and I decided that he would stay home and continue my mat leave for my daughter. 
I am so depressed and am having such a hard time because everything is "daddy daddy daddy" she no longer wants her mommy. It breaks my heart. If he's around, she's fine with me briefly but then wants him. 😭
I feel like a failure mom. I cry so much because of it. 3 months ish and my baby boy will be born. I will be home with both and my husband will be back at work. I'm so worried she will give me a hard time  
Anyone else go through a similar situation? Help 😩