You're a family. It's your family home.
Since we were married, we have had combined finances. However ever since we first started dating when I was a uni student and DH was working full time, I was funny about wanting to "pay my own way" when he would've just paid for something. I.e dinner out at the pub. Our agreement was that we would pay things in proportion. E.g he would pay for the meal and I'd buy us a round of drinks.
We are TTC, however our plan for finances is that - starting immediately we will be putting my salary directly into our (joint) car loan, and when thats paid off into a (joint) savings account and start trying to get used to living on one salary which is paid into a joint account - which we should be able to do if we're less frivolous with our spending! We will eventually have a nice little cushion for us to be able to splurge on baby things, and use as a slush fund to fall back on if needed while I'm not working.
Resolving different approaches to money is often one of the biggest hurdles in any relationship, and I honestly hope this works out for you both.