My 2 year old woke up screaming and I went in to try and comfort her... at first I was just telling her to go back to…

My 2 year old woke up screaming and I went in to try and comfort her... at first I was just telling her to go back to sleep then left the room because nothing would work until I decided to sit and rock her even though she didn't want to come with me. Eventually she gave up the fight and I started to rock her, and I just started to cry. I hate that I feel like I've been neglecting her since my son has been born... I feel like she got the shit end of the stick because I went through PPD with her & I never really connected with her the way I have my son and I feel so terrible. I hate myself for going through that and I feel in a big way it altered my way of parenting... I catch myself being irritated with her cry but not when my son does. It breaks my heart to feel the way I feel and I wish I didn't. I cried so hard with her in my arms and just ran my fingers through her hair. I feel like I've failed to give her the love I should've given from the start.. the type of love I feel I am giving my son that I should've gave to her when she was a newborn... i just need to vent. I honestly feel so terrible right now.