Can I just not apply for my Masters? I'm terrified of being rejected.
Why do you think you will be rejected?
I'm scared shitless about the grade of my grades
It can be scary to do things that you really want because you might not get it but you should still push yourself to do them. You won't have the possibility to get your dream at all if you don't.
I have no dreams.
I know you may be thinking this way now that you have no dreams. But you having the urge to get your masters proves otherwise. I recommend putting these fears away so you can apply for the Masters and I think will be beneficial for you down the line.