I do not need periods to come between Feb 25th to March 12th. So I just want to prepare my date by 10 days to come by feb 20. Last date is jan 29th. Taken regestrone tablets 3 days 3 times a day from feb 11th to feb 13th as prescribed by a doctor .today is feb 14th I stopped my tablets as per the course. Last time a year back when I have taken the same course for 3 days to postpone my periods I got it in less than 5 days after stopping the tablets. If this case does nt work at worse stage how can I start the course from feb 22nd to march 12th or I may need from feb 26th to march 12th .is it safe?