3A*A predicted rather than 4A* for Cambridge engineering

Hi, I am in year 13 studying maths, further maths, physics and chemistry. As the title says, my predicted grades are A*A*A*A; despite being 2 marks off of an A* in my mocks, my chemistry teacher refused to give me an A* predicted, and I am wondering if this will have a significant impact on my application. I am particularly worried because I am applying to Trinity College, one of if not the most competitive college in cambridge, and for one of the most competitive courses. For context my personal statement is great, and I achieved 5 9’s, 3 8’s, a 7 and a 5 at GCSE. Hopefully I smash the ESAT tomorrow.