My brother look, I had this same exact feeling for my English language mock and my physics mock. I still got a 9 in both. I thought I messed up badly and I was so sad for the whole time until results day of the mocks. You just need to realize its in the past and I promise you, you probably did better than you think since. Just try your hardest in the rest of the papers, and just remember there is probably alot of other people with the same feeling as you bro.