My woman saw her period on the 2th it ended on the 6th of this month,on the 8th we had unprotected sex,I gave my woman postinor 2 after 22hrs to 23hrs we had unprotected sex,and she use to have ulcer,after three to four,five days she complained about her stomach being heavy,making sounds,adding shape a bit,and feeling like vomiting ,is it a sign of pregnancy?