Hi ladies...I had an ultrasound on Monday and had a HR of 161 and then I had one today and it went down to 154, should I be concerned? Also, the dr told me I need to start on progesterone suppositories from week 16 until 32 weeks. Why would he have me wait til week 16 and not start me now at week 8? I do have a history of miscarriages and preterm labors due to my bicornuate uterus and incompetent cervix...Any advice would be much appreciated!! TIA