First off, I am not sure that her comments were at all appropriate, without at least providing you with some logical reason to the question in the first place. That is a weird thing to say to you, and I do not blame you at all for being perplexed by that.
Didn't you get a copy of your films on the spot? I have never had an MRI where my films were not immediately given to me. Now the report is different, that can take several days to be done, as the MRI does need the radiologist to review.
I think you should not overthink the comment and the technician could be extremely green for all we know. And to think too much on this will not help the results come any faster and will only get you worked up about something that you have no idea of at this point in time. I would add, that I would not wait until they call you, but rather continue to call them. They have no idea what the tech said to you and that you are now in "alert/concern" mode. And I would ask for a copy of the report for your records. You should ask for a copy of the report. As a matter of fact, you can get a copy of the films and that report directly from the MRI center.
Please keep us informed. I am extremely interested in hearing more from you. Hang in there.