I think if you have your heart set on a particular university then it is worth applying. Those are still just your predicted grades so who knows what you might achieve in the real exams!
But just to be safe I would also apply for universities with lower entry requirements. If you take the time now to look into some good unis with lower requirements it might make the whole thing a little less daunting. Having a plan B that you are happy with is always a good idea🙂. You have 5 choices so I would use them!