Yep I remember lots of feeds where DD would come off and my nipple would be lipstick shape, yet I hadn't felt any pain, and she had fed really well. It wasn't every feed, but more often than not. It used to really worry me but as I didn't know it until after the feed there wasn't a lot I could do at the time. In time we must have gotten it right though, as I'd forgotten about it until reading your post. Hope you find a solution soon!