PFT Tips

I'm a senior in high school applying for AFROTC scholarships, and I'm doing the PFT on the 2nd, but I'm feeling majorly unprepared because I'm like just below where I need to be to hit my minimums. Because of some health reason, I was only able to start training in September (and I had to take 2 weeks off in the middle because of a very minor surgery), after months of not being able to work out at all, and I'm just looking for any tips to help me get just a little bit better.