How do I get my AF? :(

Officially 15 days late. Tested on day 5/6 after AF due got BFN both times. Now am thinking it is a delayed or missed period. I will have to test again just to be sure. But not keeping my hopes high. Is there anywAy i can get back my AF naturally? I have never been on pill. I don't want to induce through medication if I have a chance otherwise. Help please. I want to get back to trying soon:) ps - my cycles are upto 37 days long. Never have missed or so delayed periods ever.