Periods irregular. What can be done?

My last period date was 9th August which was the 1st day of my period. I have a protected sex on 31st august. I did not get periods on 9th September and still i have not got my periods. Today's date is 22/9/2022. I have taken pregnancy test three times till now. 1st was on 16th sept afternoon then 17th sept morning with 1st urine and 19th sept morning with 1st urine. The results were negative. I have taken deviry tablet from 16th sept to 20th sept (5 days one tablet in a day). Kindly suggest me that when will i get my periods or should i take pregnancy test again. Kindly help me. What is the time period of deviry How does it work Is it possible to have slight dry vagina after taking deviry or before periods I have been having a false feeling that bleeding started but it does not bleed really. What is the issue Please suggest what can be done