Hi i am 30 years old unmarried I dnt get my periods on the same date from last 4/5 mnth for example November 7 2021 i got periods than December 13,January 9 and February 2 and March till date no periods .on 14 February 2022 i had sex but after that i have checked 4/5 times pregnancy test it's negative ,i have started deviry 10mg tablet and completed 5 days course having it twice a day .today is 6th day without tablet my back waist and stomach paining alot i feel like I'll get my periods but no there is white discharge after the pain.please help when will I get my periods and is there anything serious issue or is it normal.