Thank you for the responses Miztress and TheArtilleryman!

TheArtilleryman, you are absolutely correct. By some strange miracle, I somehow found my very first account from 2012 (which I thought I lost) before my current one. My current one hadn't been linked to the correct email, so I had trouble finding it, but I now have everything recovered! (Not that it was "missing" in the first place :-))

SSG responded promptly to my ticket back in May and suggested the same thing, that I was on the wrong account, so I had everything figured out in a couple of days. Everyone has been so helpful and considerate. Thank you all! I'm sorry for not updating this thread earlier. Miztress, I hope your issue is as simple as mine was!