Am I a bad mother?

I've been trying to bond more with my three month old daughter because I believe that I had mild postpartum depression and didn't spend the time I needed to spend with her the way I should have and let my MIL take over with her. I've been trying to get her to fall asleep for me for hours now because she's never fallen asleep for me for longer than a few minutes, only MIL, and I had to walk away and woke my husband up bawling because I'm just so upset and want to keep myself away from her so I don't get overly emotional and upset her. Am I bad for walking away and leaving her to watch her mobile in her crib? Because I feel like I am.