Strange change in life?

Throw away account because I am honestly not sure how this would be taken. A lot of my life, I have not “felt” it’s something I tried to describe to my parents when I was younger, but they were incredibly abusive both physically and mentally, so I don’t imagine it was a huge concern. I am not saying this to sound edgy or cool, but emotions/feelings/attachment- they’ve all been something I knew I *should* feel, and even confused me when I was younger, but over time it was something I just grew with. But I think, now, maybe that was just a mask? Maybe I didn’t want to admit to myself? Because, a few years ago, I became a father. And while I wasn’t objected to the mother’s presence, and for me that’s a lot, I wasn’t exactly going out of my way for her either.
That all changed exactly the first time I held my child. A girl. It was pure, raw, unfamiliar and honestly, scary. And now, things that I never looked twice at have reactions. I always thought people who cried at movies or songs did so for attention. Then, while holding my now toddler, I heard that damn abba song that goes “slipping through my fingers all the time” and I remembered her as a little baby with that broccoli sprout hair, and my eyes started welling up. This is still new and unfamiliar to me. Am I just crazy? Granted, I’m not a danger to my child or anyone else. I’m just having these huge waves of emotions when, 5 years ago, I genuinely thought there was something deeply, irrevocably wrong with me, and it was to hard to describe to find help. Like I knew what emotions were acceptable in what situations, and I got good at mimicking what I was supposed to be like. But now, I don’t recognize myself or my life anymore. Does this sound familiar to anyone else?