Yes, I have been taking them since 3 weeks before my shot "wore off". And one week after I started taking then, BAM! A period. 7 days, light but brown with some red towards the end.
Good that you are taking them. I am glad AF came for you before wearing off. No signs of AF on my part. My last shot was April2 2015. I had spotted twice for less than 2 hours on 2 different days.