Clomid round 2, no AF & BFN?

Stephanie
I am on round 2 of clomid (50mg). The first round the dr thought I had a great response, the second round he said I most likely will not ovulate based on my cd12 ultrasound but if I do it might be around 8/3. On 8/1 I had a positive OPK. I am now on CD 41 with no AF and all BFN...what is going on? Has anyone else experienced this??