Amir, welcome and congratulations on your marriage and it won't be much longer before they call you.
You may want to start gathering any additional paperwork to prove your marriage is genuine, if your wife visited after you got married, have ticket copies, print out some more of your emails, chats, gather letters, cards, etc.
They cannot discriminate against you for a disability, that's against the law. You need only be ready and prepared for the interview, practice with your wife and read through this tread to know what type of questions they ask.