Christmas is ruined

So I’m 16 and my baby daddy is 17 we are 4 months pregnant and I’m not saying this because I think it won’t work I’m saying this because it’s a concern of mine, we have been broken up for 3 1/2 of the 4 months of pregnancy and a lot of bad stuff happened while we were broken up that we both had to apologize for and we have move passed it and even though we are engaged I know things can be temporary and we can just as easily break up again which is why fights like the one we are having now scare me so much and ruin my day. So basically we just got back together on the 20th so we had a short amount of time to buy gifts so long story short I ended up getting him a cat and adoption fees and vet bills come to a couple hundred and in all my other gifts I got him everything came out to about 1k which I don’t mind because I have a couple thousand saved up from working and I know he spent about the same amount on me probably more considering he got me an engagement ring and a really nice necklace and I’m so beyond grateful like I’m not complaining and I love the gifts and I love buying gifts for him but yesterday night I sat him down and I told him that since In less than 6 months we are having a baby from now on for holidays and birthdays we need to keep a low budget and start to save a lot of our money for baby stuff and he blew up at me saying I was being childish and ungrateful and he refused to come over to Christmas today and now we aren’t still fighting but there’s a lot of tension on the phone and in texts and I can’t enjoy Christmas knowing we are upset with eachother but I stand by what I said we need to save money from now on for the baby but I’m about to just apologize for the sake of saving out relationship and Christmas