She has attempted sex 3-4 years before but there was no ejaculation of sperm into her body or may be little (doubtful) now her periods are disturbed like she had her period on 19 april next it should be on 19 may but usually delayed so on 2 june she had bleeding with no clots for 2-3 days not excess bleeding as usually she have during her period and even there were no blood clots that is fat tissues of blood that generally appear during menstruation. So she is doubtful whether can she be pregnant after 4 years or what is the reason for this disturbed menstrual cycle.