Talk to Gynecologist on About Delay In Periods

Hi Dr, My last proper period started on 19th April. My cycle is usually around 24–25 days, and my bleeding normally lasts for about 3 days. I had intercourse on 24th April and took an emergency contraceptive pill (Levonorgestrel 1.5mg) immediately after intercourse. After that, I had withdrawal bleeding on 2nd May, which lasted until around 5th May. The bleeding was moderate, similar to my normal period, and I had to change pads. Since then, I have not had my proper period. My expected period was around mid-May, but it has been delayed. I also had very light spotting on 7th June but no proper bleeding. I did a beta hCG test on 10th of june and the result was <2.30 (negative) i have not had any pregnancy symptoms, but my periods are still delayed. I want to know whether this delay is due to hormonal changes from the emergency contraceptive pill and when I should expect my normal cycle to return. Please guide me about what I should do..