Heart scare

So. I went in for a routine ultrasound when my doctor saw that Baby B ( Yes I’m having twins😍) heart rate was 200. Very high when baby A heart was 151 normal. I was sent over to L&D in my town. To then be transferred to a hospital 1 hour away because they had a NICU. JUST INCASE THE BABIES COME EARLY. I was given a steroid shot to ensure their lungs will develop fast just incase they do come early.

I was sent to get a ECO done on baby. I was told she has early fetal arrhythmia. Which he told me usually disappears during term or as the baby is born.

I’m still scared. And I’m was discharged but still a little worried.

Has anyone had this with a singleton or multiples??