Help me apply to economics!

So my plan since y10 has been to do medicine but now I have changed my mind, which is inconvenient as I am about to start y13 and do uni applications. I’m thinking something like economics or finance and accounting so a lot of things I have done for my application are now quite irrelevant. Does this stop me from getting offers for high-ranked courses and is there anything I can do to strengthen my application for economics/finance?

My A levels are maths, biology, french and chemistry and in my AS got AAAB respectively.

Just do wider reading etc, and you're fine.

Would recommend you avoid applying to LSE/Cambridge/Warwick/UCL for single subject economics without FM.