I was going to say make sure her chin is hitting the breast first. That should solve the nose problem

If your nipple is coming out the same shape as what it usually is (not pinched or longer looking) your attachment should be fine. I think it's fair to expect a little pain or discomfit. After all, we're ol boobies aren't exactly used to being sucked on 24/7 by the sweet little vacuums and get some marcallen or linsoh for sure!

I'm not sure about the burning? Mine have tingled or feel "scratchy" but not burning? Is it deep in the breast? It could be thrush maybe?