You've received acknowledgement emails from all your choices, right?
You could show her those to say that your application is in the hands of the unis now. It also says on UCAS Track that your unis have until May 2019 to respond, which is a long long while from now and so unis can take as much time as they want (until that date, obviously). Not getting offers immediately is no cause for concern.
Also, some of your unis may use the 'gathered field' approach, where they don't begin looking at applications seriously until after the 15th January deadline. This may be the case for the ones you've applied to, or perhaps they might be dealing with EU students separately.
Also, check the fastest and slowest offers thread (also in this forum) to see if your unis have actually been giving out offers yet for your chosen course.