I am confused by your confusion

Why would you wait before doing your medicals? If they sent you an e-mails asking you to do your medicals, you do them
Don't pay too much attention to the status on e-cas. The mere fact that you received medicals means that your application is well in process. They usually update it much later, if ever.
I already sent passport to Buffalo for visa but may e-cas still shows in process, medicals received.
So breathe, relax and be happy, you are good.