Fetal Bradycardia, need advice!

Hey guys, so I need some prayers and advice. I’m 16+1 and after telling my ob I was having some back pain and discharge with some blood she did an ultrasound and found babies heart rate to be only 73 bpm, usually it’s in the 140’s. She urgently called the mfm so I’ll be seeing them tomorrow. I’m having a little bit of a hard time finding info on this and management or treatment or outcomes. Does anyone have any experience with this? As of right now they have a level 2 ultrasound and fetal echo planned.