Pregnant girlfriend dumped me.

My girlfriend and I met about 6 months ago. Shes 21 and I’m 27. We hit it off pretty quick, to the point where soon after we met I came over once and she didn’t want me to leave again. So for the next 5 months we lived together. She got pregnant early on in our relationship, 2 or 3 months after we met and we were both really excited because of how well we fit with each other. We loved each other so much and had so much fun, but during that 5th, last month of living together things did get somewhat rocky due to how fast we advanced our relationship we hadn’t had too many chances to learn how to navigate each other when we argue. That’s not to say we’d argue all the time, but she didn’t like my method of communicating and I didn’t like how she’d shut down and close herself off. One day we’re riding around town and she says something about food which prompted me to ask when we were going to start doing what we talked about and cut out the unnecessary eating out so we can save money for the baby. I know that sounds a little harsh, and don’t get me wrong 9/10 I buy here anything she wants to eat but at that time I’d just become really conscious of the fact we need to prepare. Anyway, she didn’t like me asking that and it prompted her to blame it on me being a picky eater and her not knowing what to cook for me sometimes. I’d understand that if I hadn’t told her multiple times I can cook for myself on the days we can’t agree on something. She knows that because when we first moved in together I was the main cook, I want to be a chef in fact. But admittedly I dragged this argument out and took way too much offense to what she said so it spilled over to when we got back home. She locked herself in our room and wouldn’t talk to me which she does when she’s done talking about something and this particular day I wanted to show her it frustrates me. So I made conscious decision to punch our bedroom door. I didn’t black out, I didn’t envision her being the door, nothing like that. Then I left for work. Hours go by and in the middle of the night I get a long message from her about how she’s leaving and going back home with her mom. Obviously this hurt me and I was panicking hoping it wasn’t true but it was, she left. When I got back home from work all of her stuff was gone. It was a real gut punch. That was almost 2 months ago and we were working on our relationship at first but I honestly was being pushy trying to get her to come back because all I’ve known since we met is being with each other. Things have kept snowballing since she’s been gone and she recently dumped me. Coincidentally at that same time it had just hit me the damage id been doing to our relationship and our bond. I tried to express all the introspection I’d been doing but right now she doesn’t care, she doesn’t want to be together and she doesn’t even want to talk unless it’s about our son. She says it’s going to take time to rebuild a relationship of any kind and right now she’s enjoying her own space. She’s 4 months pregnant and I love her so much, not only that but I want to give our son a chance at having what neither of us had, a real family. Can anyone give me solid advice ?