Need to download Dragon Age: Origins - Awakening again

I purchased Dragon Age: Origins - Awakening (PC) and Dragon Age II (Mac) and downloaded through Origin. Unfortunately, I had to uninstall and reinstall Dragon Age: Origins, and Awakening disappeared from Other Campaigns. I assumed this was natural and that I would simply have to log in to Origin and download Awakening again, but I can't find Awakening under the My Games tab. However, Awakening still appears in my order history, right alongside DAII. I've attempted removing the DA: O-A folders from my Program Files and from the Dragon Age folder, but that didn't work; Awakening still isn't available for "re-downloading." Is there a simple solution (do I have to empty out my Recycle Bin?) or did I just waste $15? Do I have to purchase Awakening again to download it? I have searched all over the Internet for a solution and have yet to discover one; I don't know if anyone else has even had this problem, but I would certainly appreciate a *speedy* reply. (Also, I'm not incredibly tech savvy, so if anyone could give me the five-year-old computer user's version, that would be great.)

I saw where someone said they'd found it by "go(ing) through Origins, click(ing) on the Dragonage game (the name, not the picture). It takes you to the 'game information' screen. Scroll down and Awakenings is down there (and further down is any DLC you have)." But my version of Dragon Age: Origins is on a disc; I bought it right after it was released, but only recently purchased Awakening (12/14/13).