Re: Bridesmaid while breastfeeding - am I stressing for nothing.
Attending is one thing, but being in the actual wedding is entirely different. The amount of responsibilities being in the wedding are huge. If mom and baby are doing good, then it should be fine to sit in the back. Just be prepared to leave if little one decides to be noisy. I agree with Tibeca on the reception. My family has very quiet, subdued receptions, but most are very loud with lots of movement and talking. A newborn would not be able to handle all that noise very well. As a bridesmaid, it will not look very nice to leave early during the reception when there are toasts and speeches. Plus if you are not feeling well or have had complications with the birth that are still healing.
Do what you can, but don't push yourself too much. You and baby will need time after the birth to get use to the new world.