Ultrasound place ordered ANOTHER anatomy check

Alicia
I'm sitting here trying not to freak out. I went in for an anatomy check at 18 weeks. Today I went to see my doctor (20 weeks) and she said everything is fine but I need to go back at 24 weeks for them to check something. I asked her what exactly they need to check and she doesn't know. She showed me their notes and they're not even clarifying what they need to check. How do they expect me to not freak out? She showed me the results and everything had "normal" next to it so why do they want me to go back? I'm going to have to suffer for a month before I find out. I can't even call my doctor for more answers because she doesn't have any. If it were something serious, wouldn't she have told me then and there? She even said so herself that if it was something, it would have been in the notes and it wasn't. I just need some clarification for peace of mind. I tried calling the ultrasound place and they will not tell me anything until they receive the order for me to go back again.  If anyone has similar stories and can comfort me in any way, that would be great.