Stressed about missing a level offer grades

My firm choice is Mechanical Engineering MEng at the university of Edinburgh and my offer is A*AA
These were my predicted grades too but I'm so sure that I've gotten a B at most in chemistry. For context we got a new teacher at the beginning of year 2 who had never taught a level before as she was previously a GCSE teacher. Our science department took a toll in first year and like 50% of the teachers left because of issues in management. Not all of them were replaced and those that were replaced lacked the experience to fill the gap. Probably about twice per month for all of second year I begged and begged for them to provide extra help, which my school had no issue providing for my other 2 subjects. The grades in my class (the only class my teacher taught) were consistently significantly lower than the rest of the year group despite having comparable grades in year 1.
No help was given though and obviously a levels are over now and what's done is done. I really need that A and I'm so sure I haven't got it and I just don't know what to do.
Has anyone else had any similar experiences?

What is your insurance grades? If you can meet it with the B, be assured that on results day, you will be studying mechanical engineering at uni.
What I say to u, is ‘ignorance is bliss’. No need to think about it. U thinking and stressing about it will change nothing.

My firm choice is Mechanical Engineering MEng at the university of Edinburgh and my offer is A*AA
These were my predicted grades too but I'm so sure that I've gotten a B at most in chemistry. For context we got a new teacher at the beginning of year 2 who had never taught a level before as she was previously a GCSE teacher. Our science department took a toll in first year and like 50% of the teachers left because of issues in management. Not all of them were replaced and those that were replaced lacked the experience to fill the gap. Probably about twice per month for all of second year I begged and begged for them to provide extra help, which my school had no issue providing for my other 2 subjects. The grades in my class (the only class my teacher taught) were consistently significantly lower than the rest of the year group despite having comparable grades in year 1.
No help was given though and obviously a levels are over now and what's done is done. I really need that A and I'm so sure I haven't got it and I just don't know what to do.
Has anyone else had any similar experiences?

Presumably your school has written to Edinburgh to explain the issue and they can take it into account.

Highly doubt this one unfortunately they've been dodging accountability for anything and everything and I think I'm the only one who applied to edi who also took chem.

My firm choice is Mechanical Engineering MEng at the university of Edinburgh and my offer is A*AA
These were my predicted grades too but I'm so sure that I've gotten a B at most in chemistry. For context we got a new teacher at the beginning of year 2 who had never taught a level before as she was previously a GCSE teacher. Our science department took a toll in first year and like 50% of the teachers left because of issues in management. Not all of them were replaced and those that were replaced lacked the experience to fill the gap. Probably about twice per month for all of second year I begged and begged for them to provide extra help, which my school had no issue providing for my other 2 subjects. The grades in my class (the only class my teacher taught) were consistently significantly lower than the rest of the year group despite having comparable grades in year 1.
No help was given though and obviously a levels are over now and what's done is done. I really need that A and I'm so sure I haven't got it and I just don't know what to do.
Has anyone else had any similar experiences?