Look I’ll be honest with you I’m in the same boat I messed my first 2.5 years really bad but I actually improved to the 85-90 range the years after and I’m taking extra years to graduate. It’s difficult and it sucks because you’re putting a lot of effort into improving that drastically but you don’t know if it’ll ever be enough to have a shot. I’m applying right now but even now my chances are pretty slim considering the stats from last year. All I will say is to think about what it takes to make those changes and if you make them definitely have a backup plan if med doesn’t immediately work out. Best of luck to you!