Sooo advice please

So I am going on day 5 dpo.

I got off my birth control to lose weight awhile back. I’ve been testing and I got a faint but there positive tonight. My issue is that we have a 2 and a 3 year old and my husband doesn’t want anymore kids bc ours are still in diapers though I’ve been working on potty training with my oldest for awhile. If I am pregnant.. how do I tell my husband when he doesn’t want anymore kids for awhile? He’s going to be more upset than happy bc of financial reasons as well