I know of three discord servers that could be to your interest.
First, there's Chounyuu, which is great if you like hyperpreg (as well as huge breasts and other such things)https://discord.gg/hyvmdQw
Then there's 'The Nation', which is based of the site impreg-nation. More focused on pregnancy in particular.https://discord.gg/hyvmdQw
Finally, if Furry Pregnancy is your thing, there's the WISWRP discord server run by the site's original owner.https://discord.gg/RMjMgpc