Army basic training in one month...AND NERVOUS!

Though all advice will be appreciated, definitely hoping for some women's perspectives here, who have been to basic!!

I'm headed to Fort Sill on October 10th. I'm currently juuuuust at the max weight for my height, but regardless of weight I feel out of shape. My run time is good, but my situps and pushups are still below par. (I will be 27 when I ship out - run is at 18 min, pushups at 29, situps at 51)

What did you do to prepare physically? Is it as important and stressful as I'm making it out to be in my head?