Dry hair normally isn't stringy or limp. Usually over-moisturized hair is. Have you done a protein treatment? If you haven't I would try a light one. I prefer homemade protein treatments with egg yolk, mayo, etc. But I only do it as needed, not on a once a month basis or anything scheduled. And I always deep condition after I use protein.
We are going to get to the bottom of your hair issue miss!