Any advice would be grand

So today my partner and I found out we had another miscarriage one year apart from the first. We’ve been together almost 3 years and today he’s dropped the bomb shell he wants to go traveling to Australia with me as he’s been before. I’m not too sure as I’m looking to settle down and start a family as we’ve just moved into our own place. However he’s dead set on this traveling thing and I feel he’s going to hate me for holding him back even though I’ve told him if he wants to go he can but then he’s said if he goes alone then that means we’d have to split up. We’re also engaged and I just feel that I’d be unhappy if I said I’d want to go when I’m unsure what to do, but at the same time i don’t want us to split up. Any advice? 😟