Unplanned Ultrasound

I went in for my monthly check up- 15 weeks and 5 days-and my heartrate was the same as the babies so I had to get an ultrasound to make sure the baby was ok. Everything with baby was fine but why in the world was my heartrate so fast?! Now I'm scheduled for an EKG next month. Glad my baby is ok. Find out the gender next month!