Re: pacifier question
As PP have shown with their experiences, many babies are able to go back and forth between bottle/pacifier and the breast and have no nipple confusion. On the other hand, some babies do start to prefer the artificial nipples and mothers have a long struggle to get them back on the breast. Each mother really has to weigh the risk versus the benefits and decide what she's comfortable with for her baby.
One other element to consider with very young babies using pacifiers is that any amount of sucking (whether active or the "sleepy" sucking at the end of a session you referred to) helps your body learn how much milk it needs to make for your baby. In some cases, pacifier use has been linked to low supply because the mother's body is not getting all the sucking messages it requires. I think the recommendation to hold off on pacifiers and bottles until around six weeks is based on this idea. Other women have an abundant supply, with or without pacifier use at any age.
Be kind, for everyone you meet is fighting a hard battle. Plato