i have tiny curls in my hair! help!

i had really nice, straight, shiny, and soft hair this year without doing anything really. But one day i was walking to my friend's house and it was really windy that day. And i mean REALLY windy. When i got there i realized that i had this BIIIIG knot on the front of my hair! it was really icky and my hair got curly on the ends when i tried combing it out. Ever since then, my hair would have tiny little curls on the ends! Sometimes they would go zig zag [for real] and then sometimes the strand will somehow like become a knot! just one strand though! i tried using pantene pro-v and it holds the curls for a day and then the tiny curls come back again. When i comb through knots the curls start coming so i don't know what to do! Curling irons won't work they make it worse. And when i air dry my hair, once it begins drying up it becomes curly again and if i blowdry it.same thing!

Also, i'm not sure if this has to do with teh shampoo and conditioner im doing (pantene) but like half of the hair on my head has become thicker, darker, and rougher then the other half. The other half is like thinner and straigter like i like it!

How do i get rid of these tiny curls and the thick hair! Why did my hair morph like this?! lol

i tried like airdrying it but it gets puffy when it begins to dry and the curls are even worse and there are more thick strands! =( this is crazy! lol