Congratulations.. Thats a really good news MashaAllah.
So they have already started doing initial reviews for July cases. If I remember correctly, I told you that you will hear something in June or July.. right ?
Also, get the pictures developed and on the back of the pictures, write the names, date, event etc etc
Send about 25-30 pictures of wedding and about 15-20 pictures of post wedding. For additional proof of contact send your call history highlighted calls to your husband and if you can get his history that would be good to match as well. Also, emails, chat, skype, money transfer etc etc would be very solid proof of contact and relationship.