Re: 18 days old & discouraging weight gain
Welcome to the forum, mama, and congratulations on the new baby!
I am sorry you got such a discouraging evaluation from the doctor. I am not sure why weighing in at 7 lbs, 8 oz is inadequate: most guidelines are for a baby to regain birthweight by 2 weeks. Your baby is just 2 weeks, 4 days, and she has already exceeded her birthweight. Her poop frequency and color sounds totally normal, and so does her feeding pattern (hey, she's a newborn!).
The only thing that concerns me a bit is the extremely long feedings, the pain you feel from time to time, and the fact that sometimes you're not hearing your baby swallow. Now, this all could be completely normal: long feedings are par for the course with newborns, occasional pain is pretty common and not necessarily a problem so long as mom can endure it and mom isn't getting nipple damage, and not swallowing is normal in the long periods of comfort-sucking that most newborns relish. As long as you are hearing some phases of intense suck-swallow-breathe, suck-swallow-breathe (indicating letdown), what you're seeing is normal. However, since those 3 things can indicate problems with milk transfer, I think it might be a good idea for you to see a lactation consultant, preferably an IBCLC, and see if maybe there's something that can be improved. But I really doubt that you have a problem- again, weight gain and diaper output seem normal to me and I don't understand why your doc took issue with you!
Feeding on just one breast is not a problem. Think of moms of twins: they breastfeed successfully with just one breast per baby. So don't feel like you are being unfair to your baby!
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"