Repeated year 12. I want to study Medicine.

Hi. I changed schools, so I started a new sixth form in September of 2023. I should technically be in year 13, but I am in year 12. I had to enrol in year 12 because the new sixth form had different exam boards than my last for all my subjects. Repeating year 12 was out of my control because I was forced to change schools. The last sixth form was a horrible environment, with terrible teachers providing absolutely 0 support, which also affected my mental health. My grades were absolutely fine, but they wanted me to repeat year 12 or kick me out. I didn't want to stay there no longer, so I went to a different sixth form. I was told it was in my best interest to start year 12 due to the differing exam boards. Many other factors impacted my year 12 in the previous school, too. Anyways, here comes my actual question lol:

I want to study medicine. Which are the best universities to apply to since I'm technically doing my A-levels over a 3 year period? Or, would most universities consider me due to my circumstances? Moving schools and mental health are usually valid circumstances, right? Just to reiterate, my problem was not the grades but the actual sixth form I went to and the teachers. Anyway, I would appreciate it if any med students or anyone who is extremely knowledgeable with medicine admissions answers my questions!

Thanks! 😊