Hey ladies! I have a quick question.

I have been taking Prometrium to have a reg cycle since September 2018 and I have always gotten it two days after dropping the pill. This time (this is TMI) I am 4 days after the pill and I had pink and brown discharge and light pink blood but just when I wiped once... I don’t know whether to consider this CD1 because I am supposed to take my Femera 5mg on cd 1-5 this cycle and I have to set up and HSG but my OB office has to be notified cd 1 or 2. Thanks