Help!

Ok so I’m 27 weeks pregnant, baby was not planned as we didn’t think we could have kids! We got engaged in March and then found out in June that we are expecting our first baby! Well our wedding date is set for May 2, 2020 and my due date is March 4, 2020. Here’s my problem I have not looked for a dress. Any suggestions on what I should do? We can not move the wedding date as my dad has already put the deposit on the venue, plus owner of venue said he’s already booked for all of 2020.