NEED HELP ON HAIR ! help asap !?

i hate it whenever i getout of the shower dry my hair its always fizzy ! like its gross and poofs up i dont have curly hair its a little bit wavy it was deadstraight now its gone ew, how can i treat it good and make it not fizzy and ew, i do straighten my hair but only because of whenever i wash it it goes gross, any help ?