Hair is getting very dry and hard after showering, please help?

hey okay so for the past 2 years ive always dyed my hair, straightened my hair everyday, and recently for the past 7 months been blowdrying it everyday along with straightening. But now the last week or so Ive noticed when I get out of the shower when my hair starts to dry (but still damp) it feels hard, like if theres hairspray in it but there isnt. Its not my shampoo or conditioner because Ive used this same one forever. Also, my hair feels hard, and like brittle, and looks real puffy and fried when it does dry but still feels hard. Its hard to like brush it because it feels like so hard? Please help me. Why is this happening? What can I do to fix it? Anything I can buy? thanks!