Well… first of all - DO NOT FREAK OUT
(not even in your message caption, please)
You may (should) be aware that IOTA got a new snapshot. My best guess would be, that you need to 1) run the latest IOTA wallet and then 2) to create several new addresses from within the Wallet GUI & attach those to the tangle. Previously, on the August 2017 snapshot, you would need to re-create as much addresses & attach them as you previously (pre-snapshot) had.
Just today I went through the procedure myself. Let me tel you: IT WORKS, like a charm. So don’t be alarmed all of a sudden - as long as you keep your IOTA on the Tangle (instead of any lousy exchange!) - it will just remain in there - as per design, I’d like to add. (The sheer beauty of the concept!)
Therefore, I am advising you, unless you would be running some compomised computer(system) for which you would have only yourself to blame: DO NOT FREAK OUT… YES YOU SHOULD BE JUST FINE !
Just do what is required by default.