19w4d - babies heartrate is usually around 156 - todays appointment it was 117 - is this something to be concerned about?

Completely normal: If baby was sleeping or just chilled out today, can have lower heart rate. That is totally still within normal limits for your gestation, so be completely at ease. We actually very much like to see that kind of variation in baby's heart rate, so this is actually a reassuring sign. Congratulations on your pregnancy. Set up a prenatal interview with your choices for pediatrician soon to pick one!