Resting heart rate decreasing

Micky

Super nervous because my resting heart rate has been decreasing for the last couple of weeks. Went In for a scan Thursday and everything looked good but it keeps getting lower. Average resting heart rate before I found out I was pregnant was about 64 bpm. I’m also SUPER thirsty no matter how much I drink. Not sure if this is related or if anyone has had anything similar?! im about 7 weeks .TIA