Wedding guest for "festive and jovial" cocktail

I'm attending a wedding in a few weeks with "cocktail - festive and jovial" as the DC. I wore this dress to a wedding earlier this summer where the bride said it was okay, got lots of compliments. Not sure if it's too white generally but I don't have anything else super festive! I don't know the couple at this upcoming wedding. Whaddya think?

November wedding in the south with formal/black tie preferred DC

Would this be appropriate or is it giving prom?

This attention seeking diva breaking all the cardinal rules attending her SIL (!!!) wedding. I’m literally horrified

Appropriate for a Formal Cocktail Attire wedding?

Too much? Too little? I haven’t been to a wedding in ages, and I’ll be about 20 weeks pregnant. This is the one slightly more formal dress I already own. I’m hoping to disguise the awkward bump/just-big-around-the-belly stage.

Too much of a deep v??

Too white?

Bride said to buy it but I'm overthinking because of some comments I've read

Black tie optional?

Long time listener, first time caller. Is this appropriate for black tie optional? Not necessarily the color, but the cut and material. Keep in mind I am 5 feet so this may (almost) touch the floor on me.

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