Maybe it's the blowdrying that's causing your hair to break. Since it's been eight months since your last relaxer, you must always make sure your hair is properly moisturized, especially the demarcation line (the line where the new growth and the relaxed hair meet; the weakest point in your hair strands).
I would eliminate combing your hair so often and concentrate on frequent conditioner washes. Also, I would stray away from braids for sometime, so you can concentrate more on your actual strands, and to avoid any further breakage.
Also, try not to wrap your hair so often. Since it's been 8 months since your last relaxer, I'm assuming your hair is pretty thick, and getting it to wrap must be difficult. Try putting it in a loose ponytail with lot of moisture! Hope this helps!