Need Advice On Absent Withdrawal Bleeding On Stopping Duphaston

Dear Doctor,

I am on Duphaston from 16th day of my cycle. I have missed taking the ablet for two days in between and then i continued for the balance 8 days as I am advised to follow the couse of 20tablets over a spread of 10days. Normally once I stop the tablet I get my period within the next day or the foloowing day. But in this case I haven't yet got it its been three days since i finished my dosage of 10days. Can u please advise should i wait or should do something further.