8 weeks today! Excited and scared for my ultrasound today!

Hi ladies,
I'm 8 weeks today & having my first ultrasound! I'm excited and scared all at the same time! Has anyone had an ultrasound at 8 weeks? What was it like? Could you hear the heartbeat? I'm feeling quite anxious about it - there is no way I could have waited until 12 weeks! Any info or advice would be appreciated x