Will the curls stay? Plus trouble growing eyebrows

I got to do chemo twice (lucky me) due to a recurrence. My hair looked like a very bad old lady perm after both lots of chemo. However it has now gone back to the dead straight hair I always had. Very grey,  but suspect it was under all the colour I had in it before BC. The one upside of the curls for me was that once I coloured it the grey's didn't show through nearly as quickly as they do now my hair is dead straight again. 
Hugs 
Paula x