I don't know much, if anything, about various ways to put on a turban in period, so I'm unsure about the part on one side of her head where there seems to be a big knot with some hair hanging out of it.
I've included a couple colored pictures of the original to show where my confusion is...

those are the two options I see - red is hair, green is turban - I kind of think it should be the one on the left, but I'm just not quite sure... I'd say it certainly looks more visually balanced on the left, but I'm still thinking that big knotted wad of of stuff could be her hair wrapped through/around part of the turban. Any turban experts (or anyone else really
Here's a pic of what I have done so far on the painting that is furthest along (please excuse the glare, and the color in the photo is a bit off):

