Jessica, a TV antenna isn't digital or not, that was a marketing scam to sell more antennas.
But that said, you do need the proper antenna. If you live in town, rabbit ears with a loop maybe all you need. If you don't live in town you may need more.
If you give us your zip code or go to TV Fool you can put in your address there, then they have a link in bold you can post back here. With that information (your address won't show) we can tell you how much antenna you need.