We just went off using a nipple shiel, she has been feeding faster. Usually 30 to 40 minutes now. Would that make a difference?
It could... a nipple shield makes for an easier latch, slower flow, so now with a faster flow she may be taking in more air and milk on top of it, so it gets stuck.
I try to burp in the middle and after a feed. Sometimes she is tough to burp. And I don't want to go on too long because than she will get overtired.
I get this, feeds with my DS generally took about 30-40 min for a long time, because I was burping him often. But, I do think it's better to get the gas out, so it doesn't cause disrupted sleep, than worry about her getting OT. She's easily patted back to sleep, so a touch past her A time to get any gas out shouldn't be a problem. I tended to try to burp each time he pulled off in the beginning, because I have a fast flow and a good supply of milk. I'd then put him back on the same breast until it felt empty. As for being tough to burp, there are lots of different ways to try to do it. You can put her on her stomach across your legs and gently pat or rub her back, push her up higher on your shoulder so her arms dangle over and again pat or rub, or hold her chin in your hand and gently rock her back and forth and side to side. Again, I found it easier to get a burp out if I did it more frequently, than if I waited til the midpoint or end of the feed.