I signed up for a NGC submission account through the ANA and I got a little package in the mail from NGC today and it don't have a acct# for me and the only forms they sent are for ancient coins and I only collect US coins what should I do
You can go right to their site and print out a PDF submission form. If you don't have an account number they will issue one with your first submission.
You can but I would not worry too much about it. Instead maybe just attach a note to the submission stating your ANA # so as not to confuse them.