As I only had the mirena in for a few months and got it out last week what side effects should I be aware of that would need the use of progesterone . My period started today, I am kind of taking that as a good sign. Would you believe that just after I made the appointment to get it out, my obgyn office called to book my surgery to have bladder re hooked up and uterus out anyhow, so obviously the mirena was definately meant to come out.