Can I Safely Take The New Prescribed Dose Of 3 Tablets Per Day For 3 Days Of Regestrone For Missed Period?

Good evening It s been 2 months I didn t get my periods. I was suggested to use regestrone 5mg 2tablets at night for 5 days. It s been 8 days since my last dosage. Still I did not get my periods. My doctor suggested me to take 3 tablets per day for 3 days . Can i take the tablet again?Do it cause any overdose