Hi ,as your cycles are regular of 31-32 days,there for your probable date of conceiving are 17th and 18th day of period. So relations on 8th, 9th April are highly fertile and if you do not menstruate by 23-24 April your
pregnancy test may come positive.If not,you have to think of consulting your gynec and get examined for husband 's semen, your ova and tubes with quality of endometrium.