Its not too soon you'll be able to see a baby moving around and should be able to hear the heartbeat.
I had my first at 11 weeks. I saw my little one clearly and even heard and saw the heartbeat. My baby was sucking his/her thumb.
My profile picture is from my 10 week ultrasound
I went for my first ultrasound at 11 weeks and 2 days and I got to hear and see the heartbeat. 10 weeks should be ok.
I heard the heart beat at 6 weeks, so I'm sure it'll be fine
I went for my first ultrasound at 8 weeks. I'm now 10 weeks and going to the doctors to hear the heart beat on Friday.