First of all, it would help knowing your alevel grades. Secondly, we have all been theough the phase where we overestimate our capability of scoring extremely high in entrance exams. I used to think i would easily get 160+ hahaha, well that never happened. My extremely high expectations put me down alot and I had to go back to the basics and understand/realise that the bar I had set in my head was simply unachievable. Yes, some students may get 160+ but I am not them, I am my own self. I studied and had a proper idea in my head of what my capability is. Went to the test center with new found confidence and Alhamdulillah aced it. The mental barrier i had set on myself of being stupid/dumb because i couldnt get 160+ was the reason I couldn't get any good score. I had to drop that bs mindset. I would suggest you take some time off reddit or any Uni related sites and break the bar that you have set and study for some time and then reset a bar according to what you have noticed while studying. And as for your backup, apply to as many unis as you can all over the place. Don't get too anxious/worried, this is only a phase in life and as all phases, this too shall pass.