No periods. Wht should i do next?

I have not got periods since Dec 26th 2017. That was my last period. In January i took Zevert and Stuqeron for Vertigo because I was having some giddiness issues. It was prescibed by an ENT doctor. When i didnt get periods in 3 months, I got my harmones and pregnancy checked and everything was normal. Reports attached. Not pregnant. Now I have taken Medicine for projestrone for 8 days and still have not got periods. Wht should I do next? Should I continue medicine for more days or do something else. Please help to find the problem. My mom once took medicine for missed periods and she got them within 4-5 days. I have no other allergies or problems. I am overweight but not obese. I am active in workouts and not on any birth control pills. Have never used them.