How hard would basic training be for me?

I leave for Army BCT in Ft. Benning Georgia in 18 days. I can laready max out on the situps and i am really close to maxing out on the pushups, my run time isnt so good though, I run 2 miles in 17 minutes, and I'm still working on getting it lower by running like everyday. I'm 20 years old I weigh 162. I spent a year and 3 months in a correctional program for "At Risk" youth in NM. We had morning running everyday at 7:00am where we ran at least a mile or we did sprints. All of the staff there were like Drill Sergeants, constantly yelling at you for everything, we could never do anything right in their eyes. We also had inspection where we had to have the whole house spotless before 9:00am. We also had to do 15 mile hikes through the mountians with a 40-50lb backpack carrying our tents, food, clothes, water,sleeping bags, and anything thing else you wanted to bring. So I'm pretty much used to alot of things that we might be doing in BCT. Just wanted to know how people will think I might hold up over there. I'm just getting pretty nervous about it and having second thoughts about joining...too late now I guess