i have really dry hair..i don't know why it's like that

when i went to see my barber, she told me that i was born with a perm. it's like what black people do to their hair to make it more thicker since most of them were born with thin hair..she also told me that they can help can rid of it if i dyed my hair..i asked my mom, but she said no..anyway i'm azn so my hair makes me look kinda strange

and it's really annoying..i use conditioner, i towel dry my hair, i use my hair straightener only two or three times a week, i wash my hair twice a week..and everytime i wash my hair and let it dry, a few hours later it becomes really poofy and dry feeling

argh, do you guys know anything that can help?