Irregular Heartbeat?

Tandee
I went to my doctors on Friday, and during my check up we were listening to baby and the heart rate and it just sounded weird. It skipped several beats and would get weak and then speed back up. Doctor said it happens some times but just to be safe she's sending me to a high risk doctor. But I don't get to see him until this coming Friday. I'm nervous. Worried for baby. Anyone else have this happen?? I'm 35 weeks today.