Getting a scan today, hope we can see the gender!

19+1 today and I have a perinatal appointment this afternoon. I'm REALLY hoping that the tech will be able to see the gender today. If not I made a back up appointment at a sneak peak place, but that's another 5 days of waiting!! 
Side question, does anyone else start to worry the week of their appointments? I don't worry too too much until it's the week of and then the "what ifs" start up for me.