Needs advice, never posted :/

My lady and I have been together for 6 years. We have a 16 month old who was a happy surprise 3 months after we got engaged. I had a few doubts about the proposal after 4 years, but ultimately decided that if I let her go, any girl I ever dated would have to live up to her standards and that she would make a great mom. We have different upbringings and she has years of experience with kids(taught and babysat for a decade) where I just have a bunch of brothers and sisters. I love her and she loves me but over the past couple months I’ve been feeling like there is a sort of condescension to some comments or feelings that I might not be good enough for her standards as a Dad. During a small tiff, Im I asked her “what do you think of me as a Dad?” She asked me why, I told her it was because I was feeling talked down to. She told me she was never talking down to me, that its my perception and I’m misinterpreting her. She told me I was a good dad and that Im learning as I go and making changes. But then she said that she would not have said that during the first 5 months. This broke my heart. I asked her why she never told me during those months and she replied that she didnt think I was in a place where she could bring it up. This was gut kick #2 I thought I was doing all I could, I was working 12 hour shifts at work and managing my company on the side. When she worked (also 12 hour shifts) I would watch him from wake up till sleep. I admit, I was grumpy sometimes, I raised my voice a few times, but I was there every day that I wasnt working and I thought I gave everything I knew how to give. We’re planning our wedding right now, and I feel my feet getting cold sometimes. Can I stay with someone who felt like she couldnt talk to me about something as important as parenting for 5 months? Am I being dramatic? Im pretty heartbroken right now, I come from a bastard home It brings tears to my eyes thinking about having to share custody of my little guy. Real help is appreciated. Ty!