Well, i'll second juventus bro. If you want to choose medical career then repeat MCAT. You can also choose DPharmacy. I have 5 doctors in my own family. And i know how it's hard to become a doctor. You'll need 12-15 years to become a doctor. Getting an MBBS degree is not enough now. You have to do specilization. So, it needs alot of money.
Can't say about ACCA. If you think, you have command over math go for it. But i'll suggest you to get admisson in engineer college but for this, you have to repeat math subjects. It would be better for you if you go for this option.
BBA is also a good option if you able to get admission in LSE and LUMS. And i think, you can get admission in it with a medical background.