I have had these dreams before, with both my PG's and also friends and family.

I told my stepmum she was PG with my youngest brother before she had her blood test to confirm.
I'm not always right but generally if i dream of someone being PG i keep it to myself til i know... lol although once i saw a belly and nothing else... 3 friends were PG within a mth of each other!

good luck with TTC and hopefully all goes well over SPRING!