help a bridesmaid out??

So my good friend asked me to be a bridesmaid in her wedding last year.. just found out I'm 4 weeks pregnant. Her wedding is October 14th and I'm due October 23rd. She had texted me asking me when I want to go get fitted for my dress.. I told her as soon as I found out that I was pregnant.. what would you do i of course will be be at the wedding! But i don't feel comfortable standing up there looking huge!! I know it's her day and everything but I'm stuck!! Any advice!?