It most likely has not been enough time for a Federal refund. For a paper mailed return, it can take approximately 6 weeks to get a Federal refund.
After 4 weeks from mailing, it should show up in this IRS "Where's My Refund" tool. Do you see any evidence of it there yet at this link:
http://www.irs.gov/Refunds
Here's how to track a State refund.
FAQ: How do I track my state refund?
https://ttlc.intuit.com/replies/3300211
