Hi.. Symptoms of pregnancy are missed periods or any abnormality in the period flow, nausea, enlarged and sore breast, fatiguability, food cravings, headache and body pains.. If any of these symptoms develop you may need test to confirm pregnancy... Well paternity can be confirmed by doing the DNA test. The other test is Blood grouping and Rh typing which is also used to help in determining the paternity but is not confirmatory..