Monumental Tapestry disappeared after preview?

I got a Monumental Tapestry from Gwen during the preview, but I didn't use it. Now I can't find it - not in my inventory, not in my stash, not on any mule character.

I am not 100% sure (perhaps I did something stupid? Can't think what), but it seems it simply disappeared after the preview. Did this happen to anyone else? Are there enough tapestries to find elsewhere in the game to unlock all of the monuments?

you only get enough to fill 1 hall.

There are only 4 Tapestries in the game, so if you cannot retrieve that Tapestry, then you're kind outta luck. Though, you're not missing much. If you're really bent on getting the whole HoM, just take one from another character and use storage to give it to your main character, or buy one from a player.