Should I straighten my hair? Will it fix my problem?

Your hair sounds pretty similar to mine. I straighten it nearly everyday, and though sometimes it stays straight, most days it still ends up knotted and kinda frizzy by the middle of the day, especially with wind. Also, my hairs pretty damaged from the heat now. Try it, and see how it goes, bur if you still have the same problems, leave it as it is, coz trust me, you don't wanna end up with all the split ends I have.