Hair changed texture after blond highlights - help!

I recently got my blonde highlights touched up and for some reason, this time, when I use shampoo, my hair becomes straw like and coarse until I apply conditioner. For example I used to use the Moroccan oil shampoo and conditioner (volume one) without issue but now my hair becomes a strange texture when I apply it in the shower.

I think my hair is probably damaged? What can I do to help this?