Q: Is there somewhere I can get a cheap prenatal paternity test?
A: DNA Diagnostics Center can help arrange for a prenatal paternity test to be done either along with other in-utero tests (like amnio tests for genetic diseases, etc.) or by itself through an amnio or CVS.
You can go here for more info: http://www.dnacenter.com/paternity/prenatal-testing.html. I hope this helps. Good luck to you!