Wedding guest dress - 11 weeks pregnant?

Si

I’m attending a wedding just shy of 11 weeks pregnant and need to get a new dress. I started this pregnancy about 10 pounds heavier than my baseline and this is my third, so nothing I have fits… I also won’t quite be ready to say/show I’m pregnant.

Any ideas on where to find a good dress? I’m only about 7 weeks now, so I could still change a good bit between now and then too.