Hi I have had my period for about 2 weeks, I then went to the doctor and he gave me sonolut (norethisterone 5mg), after I had completed the 5 pills (1 per day) on the second day that I started taking the pill my period had stopped. But after 2 days upon finishing the pills my period is now back. This is the second time that this is happening to me.

The first time I did go for an ultra sound and he said there are no ovarian cysts

Time to go back to your doctor.