You can get a DNA paternity test as early as the 7th week of pregnancy using a non-invasive prenatal paternity test (NIPP). This test analyzes fetal DNA found in the mother's blood.
However, if you're interested in a prenatal paternity test to determine the father's identity, it's crucial to consult with your healthcare provider. They can help determine if a NIPP test is appropriate for your situation and advise you on the best options available.