Talk to Gynecologist on Periods Problem

Hello Doctor, I missed my period this month and I am concerned about a possible pregnancy. I already have two children, with my youngest being just 1.5 years old, and I am not planning for another pregnancy at this time. I had an ultrasound done, but nothing was detected yet. My gynecologist advised me to repeat the scan next week. Could you please suggest any medication to terminate a pregnancy at an early stage. 10 days passed of my period date.