Are you male or female, if you don't mind me asking?
If you're male, you probably will. Men usually keep growing until late teens or even 20s, so as you're 15 you'll probably still grow!
If you're female, there's a chance you'll have stopped growing by now unfortunately. I'm a 15 year old female and I've pretty much stopped (although I'm 5'10 so I'm glad of it).
Either way, don't worry!!