Irregular heart beat 😭

So I have been referred to cardiac specialist cause babies heart beat is sounding very irregular. Had an ultrasound done and the heart chambers seem perfect but she seems to have an extra heart beat which kinda sound like hiccups. Feeling very anguish about it as the appt won't be until mid to late January as the specialist is away on holiday and is the only one within and hour of where I live (I live in the country). Please I ask for all your prayers that baby is healthy and nothing is wrong with my lil bundle of joy.