Early miscarriage - can I still start my Letrozole on CD3?

I’m currently going through an early miscarriage(5 weeks, 3 days) after my first round of Letrozole and wondering if it’s okay to start Letrozole again on CD3? The last time I had an early loss, it was earlier than this but I bled for almost 2 weeks. I don’t see my OB until Thursday.