Hi Calico and welcome,

Sorry I just replied to this and lost my post! Grrr. I'll try again.

Basically, yes, progesterone pessaries can delay the period because their purpose is to artificially maintain your endometrium. The only way to tell if you are pg is to go in to the clinic for a blood test. Everything I have read says that no matter what, you must do that because other symptoms cannot be relied upon.

Hope that helps.

Love,

Mel