Finding clothes to wear before having a baby and after is a challenge.
Something I used that made it a lot easier was my bella band.
It is just an elastic band that you can use to cover up your belly
when it peeks out from between your shirt and pants.
They come in many different colors - Black, White and a few others,
and they are made by Ingrid & Isabel.
Here is the link to the official site:
Here is the one I wear.
These are great for post-pregnancy too
since it takes a little while to get back to pre-pregnancy shape.