prometruim & periods

Went to Dr for irregular periods, and he prescribed me Prometruim 200MG (progesterone pills) to help me out. Dr gave me 3 months worth, and he said it could work immediately or it might take all 3 months to work. Well after the first month, my AF started exactly when it was supposed to but it did not start the second month. I am currently 4 days late. My partner and I do not use protection and we have sex pretty normal (every2-3 days). What do you guys suggest? We want a baby, should I test or wait it out?