I'm not sure exactly how applying in your first year of a different course works. I imagine some unis wouldn't mind, but I think other would prefer you to finish the course you'd started.
Your grades are great, so would you consider taking a year out and applying for medicine in your gap year? It sounds like you still feel medicine is for you, and many people get in upon their 2nd application.
Pharmacy places will still be available next year if you're still interested in it.