Hi Doctor! Im delayed for 78 days. I had my last menses last march 22. Whole month of april i dont have it. I dont have sexual intercourse with my bf. only last May 3 and was followed on May 19 we had sex but with the use of condom. Last june 2 i did pregnancy test with negative result. Im just worried because until now i dont yet have my menses. I dont have anymore sexual intercourse with my bf from May 20 onwards.