Heart palpitations

32+1, went to my OB appt and she measured, listened to heartbeats and felt for the babies. She said baby As head is super low and grabbed at it to show me (from abdomen obvi) definitely has more Braxton Hicks since appt and my heart races off and on right now laying in bed it’s 100 bpm and feel like can’t catch my breath. My BP was 117/70 at the office... anyone else get these feelings??