Hello there. Wait for a few more days and if you still don't get the periods, take the test again. if it still comes negative, get a ultrasound abdomen and pelvis done at a good lab and then consult a gynaecologist with the reports and then take it further from there. you could also repost the question with the reports and our gynaecologists would try to help you as much as possible or you could even post on the private section to me. All the Best. Regards.