Late cycle

Oriana

I been on clomiphene for 4 months and after 4 years of no ovulating last month it was positive. Now I’m on day 35 of my circle and no menses. I did spotted Thursday and Saturday nothing else. Pregnancy test been negative. Last week I experienced cramping for 2 days. I never have been late. I don’t know if I should wait a little longer or if I should take a blood test.

Has anyone experienced this while on fertility treatments?