Hey!
It is pretty scary getting used to peeling snakes when they have bad sheds, faces are a little scary too, but sometimes if a piece won't come off, keep their humidity up where you guys have it and the extra bits will come off. Spectacle are best to get off as soon as you can, but also very carefully. Don't force them obviously. But if there are bits around her mouth or on top of her head, just be sure to get her a good humid hide and all that stuff for her next shed and those things usually come off after a whole good shed! They hate it, but don't tense up and stress out. Stay calm, breath normally and give them (and yourself!) a little time to relax and take your time. You can always try again! And when it is all over, you can give her a few days of alone time to recover. Snakes don't usually hold grudges, especially if you give them some mellow, no head touching handling time a day or two later. My little boy was a total spaz and he has mellowed out well, despite me being a stressball newbie owner when I first got him.
I will use damp pillowcases or hand towels to aid sheds. Wet down the material in warm water and wring it as dry as you can. It should still be damp, but not dripping! I lay it over their fav. hide, especially while they are in it. Just be sure they aren't trapped and don't leave it in there too long. I usually leave them overnight, wash them and replace it with a new one if they haven't shed. My adults usually have an easier time than the babies, so they are usually fine with less than 48 hours of damp towel.