I want to ask dat I have taken regestrone tablet for 5 days after consulting Dr. Nd after finishing that course of 5 days I got my prds after 3 days days. But the flow of period was less as compared with before and I have prds for 4 days only as I use to have for 5 to 6 days here I want to ask to ask that is evrthng nrml their is no such chance of prgncy as I have done prgncy test also the result was negative after dat I had taken regestrone tablet the only thing is that flow was less is their something to worry can you please suggest.