Don’t know what to study at university anymore

Hi , I applied to dentistry but unfortunately my school submitted the wrong predicted grades causing me to be rejected by 3 universities straight away. I then had an interview and was put on the waiting list. I really don’t know what to do , I think with all this stress it’s affecting my exams atm. My only other option is biomedical sciences but I really don’t want to study that course , anyone got any advice?
It’s extremely annoying when a small mistake from your school could do this to your application and take away so much from all the hardwork I put in for my application and during year 12.