Hi! I Have A Problem Of Irregular Periods, So I

Hi! I have a problem of irregular periods, so i took duphaston to induce periods. I had two cycles of clomid for 50mg with regular periods and now i upped my dosage for 100mg of clomid with 3 days late period with negative hpts. So now if pregnancy not occurred then periods will come itself by the action of clomid or again need to take duphaston to induce periods after clomid treatment?