Date change equals bigger budget

So due to the fact that I'm pregnant and expected to deliver 8 weeks before our original wedding date (10/17/20) . Our new date (05/01/21). So that gives me an extra 9 months after birth. To recover from birth and be healthy and not bleeding or nursing a newborn. Anyways. Now that we have an extra 7 months our budget got bigger because we have more time to save money. This makes me want to change everything. Our venue is the biggest one. I originally chose an outdoor tent venue because of budget but originally wanted something indoors. But that's means the caterer we hired we can't use because most banquets want you to use their catering and all of that. So now I'm lost!! Should I change everything and lose the deposit money. Or should I keep it the same and use the extra money towards something else for the wedding? I'm torn, my FH wants to keep it the same but now I think I want my indoor wedding. Our original budget was 18K and the extra 7 months will bring it up to 28K.