Anatomy scan has me on edge

Shelby
Last month my dr quit so I had to go to another affiliated practice. At 23 weeks, the new dr did an anatomy scan, which was yesterday. During the scan the tech asked if I did a genetic test. I said no. But didn't understand as to my she asked me that. 
I get back to the dr and he says "oh everything looks good with baby..but.....*my heart dropped* we found a small calcification in her left ventricle. This is a possible soft marker for DS. I suggest doing the genetic testing to be sure. There is only one which is common so I'm not concerned at all, plus there are no other signs." At this point, I am trying my hardest to keep back the tears. All I kept thinking was "This is the first appt I have been at alone. My husband got off of a 14 hour shift and came straight to the dr office. The dr office messed up my appt and didn't schedule my ultrasound so they had to fit us in. He was tired so he went home to rest. And this is the news I get?" 
I took the genetic test and they told me someone will call next week. 
My mind was racing, I couldn't stop crying. Waiting these 7-10 days for results is going to be nerve racking.