improve running/fitness

Question
hello sir

i have a selection day coming up for the army(2 1/2 wk's).I didn't expect it to be so soon,iv just come off my holiday's and i feel very un-fit.

i need to improve my running especially,i need to be able to run  1 1/2 mile's in 12 minute's...but I'm having trouble running for more than a few minute's.

please help me?

iv cleaned my diet up completely,and iam running every other day.

I'm desperate on the joining the army sir please help

thanks in advance

Answer
Hi Peter
If i'm reading this correctly,you have the 11/2 mile run test in two and   half weeks and you can only run a few minutes.It is not possible in this short amount of time with any kind of training.Please get back to me if i read this wrong.

All the best

John