Hmmm, good question… Everything is a bit saggy, in the first couple of days my body looked like I was 5 months pregnant from all the loose skin, the organs being in different positions and such. I guess the difference after birth is not that stark, as the baby is so close to the body all the time, so you still feel the weight, the movement. And the baby takes up all the focus, so in the first two months, I didn’t focus much on how my body felt, but recently I got a glimpse of how my body felt before the pregnancy, and that somehow shocked me, I was so accustomed to the changed body that I forgot how it felt being without a baby.
When a breast gets fuller and fuller, it starts to ache, a bit like a sore muscle. At first it is more like a gentle pull, reminding you to empty this breast. If that’s not possible, it gets fuller and fuller, to a point where it feels like a breast implant is in there, so plump and full. When the lactation reflex starts during feeding, the other full breast will start to drip, which I only notice afterwards, when I see some wet spots on the sheets or feel the wet nipple. Quite strange, when the body does stuff without me noticing it. An empty breast feels saggy and very empty, even though there almost always is still some milk in there. I think that is mainly psychological, as the fear of having no milk left while having a hungry baby makes an empty breast feel VERY empty. In contrast, a plump breast is somehow satisfying, you feel like that breast alone could fill your baby up until the next meal :D
I’m glad you have a supportive partner!