has anyone ever used their sonoline b 3mhz everyday? I've used mine the 16th, 17th, 18th the first day that I got it I used it maybe 5 times to show everyone and the second day I used it one time and then yesterday I used it one time but not very long it wasn't even 5 minutes. I got a ultrasound coming up on the 4th and I'm worried that it's alot on the baby.