The best advice I can really give is - don't fight it. If you feel you want to cry, then do it. If you hold off on that, and things are exactly as he said, its just going to be twice as hard at a time when you need to be ready and level headed. Best thing you can do for your mental state, imo, is let it all out. People always try and bottle it up, but I found letting yourself follow the need to be very therapeutic.

Once you have mourned for the loss of the 'perfect pregnancy' as every woman envisions at the beginning, you are prepared for the challenges that reality likes to bring crashing down into our ideal worlds.