I found some turtleneck or high collar long sleeve form fitting maternity dresses on Amazon! I was too last minute to be able to get shein or pink Blush i needed fast lol. They are form fitting though, so just depends on your comfort level with that.

Maternity Dress Baby Shower Dress... https://www.amazon.com/dp/B09MD1M8R1?ref=ppx_pop_mob_ap_share

abkylie Maternity Dress Pink... https://www.amazon.com/dp/B0BC3QVPVR?ref=ppx_pop_mob_ap_share

The sweater one was great because it was thicker, unfortunately they sent me beige instead of the pink I wanted so I went with a third option, which is a little lower cut than the others but even in pregnancy I’ve maintained my A cups lol so it worked for me.

Good luck finding a dress! It stressed me out so much haha