3 month pregnancy leave

Hello! I was just curious to other people's experiences.  I have suffered from anxiety / depression for over 12 years now.  I have been doing so well with medication and then I got pregnant and I am only left on a small dose of Prozac.  The main topic here is.. I'm taking 3 months off my job when my baby is due.  I was wondering if anyone else has been in my shoes and what it's like when I'm going to have to go back to work? Am I going to be depressed etc.. Thx