Hi Sydeny moose,
It's not impossible, but, you may not be able to do any of the bridesmaidly tasks your friend will need from you on the day. If she has more than 2 BM's, you might be able to do the ceremony, but even just with feeding the baby, it'll be very hard to traipse around with everyone for the photos.
My boss was bridesmaid for her SIL 6 days after her 3rd baby was born, but she had her Mum and others help her, and the other bridesmaids did all the 'work'. I'm not sure how they managed to get her dress to fit, maybe it was made 2 days before the wedding?
Maybe you could be more of a very special, honorary bridesmaid on the day, and just be there for your friend. Then you won't have to try to be BM and New Mum....both a tough jobs.
I'm sure you've had a lot of good advise for and against, and you can now decide what's right for you. I'm sure you'll be happy whichever decision you make.

