Will progesterone suppositories mask a mc?

I am 5w 4d and currently taking progesterone suppositories (2 previous losses) I have most symptoms, sore boobs, fatigue, heartburn however I know that these can also be caused by the progesterone, if I were to have a miscarriage will the suppositories keep me from bleeding and realizing that I'm going through one? I know they can hold back your period if you don't stop using them..my first Dr visit is on March 17, TIA