First time mama needing advice❤️

So my lovely’s. I’m currently 22 weeks 5 days but I can’t help myself and I keep over thinking about when she’s going to be here and I really think I’m worrying myself too much but what do you all think?

I’m really wanting to breast feed my daughter but I also want to formula feed her too. I would prefer to give her formula milk most of the time and once or twice in the day give her breast milk but can I do that or will that not work? Is it okay to give her both or shall I just stick to one?