Is There Any Chance Of Pregnancy After Stopping Duphaston Two Days Ago While Having PCOS?

My last period is 16/06/2024 I took letrazole for conceive. Follicular study done took hcg 1000iui on day 14 of cycle and I took duphaston 10 mg TDS from 1st July. Had mild spotting on 16th July and 17th July no spotting.but 18th July once spotting was there. I took beta HCG titer on 18th July it was NEGATIVE. My doctor told me to stop duphaston. This is 2nd day after stopping duphaston is there any chance of pregnancy.i have PCOS problem