Is my wife preggo?

She is on yasmin and she took the last 2 pills the same day before her period. Last month she skipped her period. On the That night we had unprotected . She got her period and then during her period we had uprotected . Her and were really sore and had lower back pain and she was sore downstairs. Now she been back on her pills one day early. Her s are sensitve and she still sore downstairs with spotting. Could she be pregoo?