Will a university take back their offer if my my predicted grade drops?

I received a conditional offer with requirements identical to my predicted grade, but my school might decide to lower my predicted grade now because I didn't do so well in my mocks. I'm really worried that the university might decide to take back their offer, is it likely for this to happen and should I email the university about this?

No. Once the Offer is issued that's it, it's a done deal.

But I have not confirmed my offers yet.

I really worried because my school told me that they will contact the universities if my predicted grade changes

They won't. And they can't change your application after it's been sent anyway.

They are just proding you to encourage you to do well. As I said, it's fine.

Thanks , hopefully they won't, but I'm feeling quite desperate because it's my first choice uni.

Thanks , hopefully they won't, but I'm feeling quite desperate because it's my first choice uni.

This is an empty threat - I'm a teacher and no-one can change predictions now.

They are just pushing you to work harder but not in the way I would do ...

Good luck in getting the grades for the uni you want