To buy or not to buy

Idk if this is the right place to ask, if not - feel free to delete my post.

I am in a bit of a conundrum. I am currently 31 weeks pregnant with my second baby. And I have been invited for a wedding next week. I ordered the most beautiful (expensive) red dress online on a whim, secretly knowing it wouldn't fit because I look like a pregnant whale. Yes, my selfesteem has hit new lows in this second pregnancy.

But omg it is gorgeous. I look like a pregnant godess. I even ordered matching shoes and jewelery.

Now the thing is, it is expensive. I was almost certain it wouldn't fit, and I'd just send it back - no harm no foul. But now it DOES fit (and looks gorgeous).

So is it worth it to spend +/- 140 euros (I bought it on discount, original price was 100 euros more) on a dress I might be able to wear once, since I have no clue what my postpartum body will look like?