What Can I Do To Stop 8 Days Of Spotting After Taking Utrogestan And Duphaston, Given That My Pregnancy Test Is Negative?

I took the morning after pill 3 times in 3 months respectively and missed my period in the 4th month. My doctor prescribed utrogestan and duphaston for 10 days and I had my normal period for 3days. My period was late in the 5th month but finally spotted for 3days. My doctor put me on the same medication which I started 2 weeks after the spotting. 4days into the medication, another spotting started and I have been spotting for 8days and it doesn t seem to want to stop. The doctor advises me to stop the medication but the spotting has not stopped. A pregnancy test is negative. What else can I do to stop the blood spotting? My doctor says it will stop, but I am worried because it is already 8days.