Doc appointment today

Everything's looking okay, Bella's heartbeat is at 150bpm & she is currently head down. I have a ultrasound 03/29 at 12:45pm because apparently there was a spot on Bella's heart at her 20 week ultrasound that my old doctor never told me about, I had done all my quad screening etc and everything came back normal so I wonder if she wasn't concerned about it. But my new doctor wants to get me in to ultrasound just to make sure everything is okay. The term is Fetal Cardiac Echogenic Focus & I was reading online a lot of people have this happen to them at their 20 week ultrasound and came back to get a ultrasound later on and the spot was gone. The doctor said that the ultrasound machine is super sensitive & sometimes will pick up stuff that isn't a concern but looks like it. He said hes 99% positive that it isn't anything but just wants to make sure which is fine because ill be able to see her again on ultrasound :]  The new doctor is a guy but he doesn't seem creepy at all & I felt perfectly comfortable with him. & then I have a follow up appointment with him 3/31 @ 2pm.