Fitbit HR & resting heart rate

Rebecca✨ • 29,FTM to my 2 year old daughter && coffee-obsessed!
Ok so I know that the heart rate monitor is not 100% accurate but my resting heart rate has been decreasing and I thought heart rate was supposed to increase with pregnancy
I'm taking a progesterone suppository at night & kind of wondering if that would mess with resting heart rate? It makes me very drowsy to the point where I'm asleep 30 minutes after inserting the pill.