First baby, all of this is new and scary

I have PCOS.

7 wks 5 days pregnant with first child. Went to first doctors appointment last week, ultrasound looked great, heart beat was 133-140. Blood work came back and progesterone levels were "a little low". Doc started me out on Progesterone 100 mg (oral tablets insert vaginally at bedtime) since I started taking the progesterone I have cramped A LOT more than before with very light and faint pink spotting. I can't tell if it is the desolved pill (which is pink in color as well or spotting) Is this normal? 

Called doctor over the weekend and she said if cramping gets worse go to ER or wait and come in to office today.