Omg, I laughed so hard reading this!
Okay, well to answer your questions from the experience of a mom who has breastfed...
Before I got pregnant, I filled out an A cup nicely. Then after I had my son, I knew I was going to breastfeed for reasons such as baby's health, bonding experiences, and financial savings. However, I also knew I was going to supplement with formula at least a couple times a day because I was a single mom and a full time college student at the time and had to have my son in daycare, so there was no way I could exclusively breastfeed.
When my son was born, my milk came in about 36 hours later, and that was the most PAINFUL thing that has ever happened to my upper torso in my life! I'm not exaggerating in the least when I tell you that in less than 24 hours, I went from an A to a C cup. I felt like I couldn't breathe and I couldn't lift my arms. My breasts did get a few stretch marks, which now, four years later, are not even visible anymore (unfortunately, my tummy stretch marks are and I hate that, but at least my boobs don't look like road maps to match).
I breastfed for eight months about two or three times a day, and co-slept at night and fed from one breast at least twice a night. In the morning, I would pump from the other breast so he would have milk for his morning feeding at daycare. The rest of the day he was supplemented with formula until he came home to me.
As far as sleeping issues, like I said, we co-slept, which I thought was the best thing of all about breastfeeding, because #1, your baby is snuggled next to you all night, and #2, you don't have to get up to prepare a bottle if they get hungry; you just roll over and give them a boob, or get up and get them out of the crib and then lay down with them. I never really had a problem with my son needing me as a pacifier; he would eat and when I knew he was done but wouldn't let go, I'd break his suction and then put a pacifier in his mouth, or oftentimes, he'd just fall right to sleep anyway.
I weaned him at eight months because I couldn't seem to break his habit of biting :-S. Not only that, but by eight months, he was only feeding in mornings anyway, because at night all he preferred was solid food.
As I dried up, I unfortunately went from a lovely C cup to a B...and then within a week of weaning, I went to less than an A. I am still that way. It's pathetic. Plus I'm not "perky" anymore, but I'm not saggy, either. What I'm saying is that they don't look bad and ugly, but they're certainly not what they used to be.
But oh well...I wouldn't change a thing. Breastfeeding my son was the best descision I made for him and me together.