Thanks for your query.
Your doctor has prescribed the proper form of medical abortion
Sometimes, it takes a longer while for the vaginal tablets
to melt, more than 3 hours.
Also, if they are properly inserted high up in the vagina, sometimes you might not feel anything when they melt except a slight discharge, as they are absorbed into the vagina.
So please do not worry.
And go for proper follow up check up as advised by your gynecologist