Joined the ARMY wat shoudl i do ..?

well ive been trying to het in the army for 4 years i could never get the ping score for the asvab but now that i finially got in im scared i still need to p my physical but ive ped it before im scared now thinking im gonna go to iraq i just need money for school and cause i tought i was ready for the army what should i do should i back out or just continue advice plez