Does Duphaston Contain HCG That Could Cause A False Positive Pregnancy Test?

Question: I had my ovulation on 16th of this cycle and started taking duphaston from 20th onwards for 5 days. After 5 days I took home pregnancy test it showed positive. But now on 6 days it starts bleeding Am I really pregnant or there are HCG elements in duphaston which are responsible for the positive test?