Your photos actually live in the cloud. Did they disappear from there as well? You can log in with your Adobe ID at https://lightroom.adobe.com to verify your cloud library. Do the photos show up there?
Can you verify that your Subscribed Adobe ID is the same as the Adobe ID with which you logged in previously and today? It sounds like you may have more than one Adobe ID in play and that you pictures reside on another ID.
I checked the Email address you've used to register at this forum and your name and do not find any active subscriptions. I only find one Adobe ID under your name or email. Do you know if your photos were synced to the cloud before you made the storage change?
I am not sure i was on a free trial and after the expired my photos was gone it logged me out of lightroom and when i went back in there was nothing then it started sync my photos that is on my phone now