Did you obtain an Auto loan? You might try a Kohl's Card, JC Penny, Sears as well.
I encourage at least 2 open active trade lines and do it pronto so that in 9 months you will at least have 6 months history reporting to all 3 bureaus.
Be sure any new account reports to ALL 3 Bureaus.
If you happend to still be having any problems I recommend contact Jeff and Michelle Harris at Revital Credit. They are wonderful to work with and I have seen them help clients establish credit. I know they would be able to have some great recommendations for you.
Best of luck and feel free to reach out to me if you would like their contact information.
My suggestion is to speak directly with your current bank about getting a Visa/Mastercard from them that could either be a true credit card or a debit card either is fine,. I believe using this for the next six months in conjunction with your car note and any utility bills you have in your name should be enough to establish a credit score for you.
I wish you nothing but the best.