Period came 27/04/16 lasted 5 days came back 30/05/16 had sex 17/06/16 now no period am i pregnant ?

Maybe.: Pregnancy is the most common cause of a missed period. If not pregnant, other causes of a late or missed period include: excessive weight loss or weight gain, increased exercising, emotional stress, having an illness, traveling, medicines (especially birth control pills), hormonal disorders, etc… A home urine pregnancy test is very accurate 3 weeks after sex or 1 week after missing a period.