First vaginal ultrasound wednesday/scared

Im scared, I have my first US wed. morning... I will be 6weeks6days. But I know that I ve ovulated late (CD16).I hope they will be able to see/hear heartbeat and that everything is ok. I dont have any symptoms so I think it doesnt look good ! :/ Until I was 5weeks I had cramps but it went away...boobs are a little sore, but thats it. Prayers please!!!