Issue with Git in Android Studio

Yesterday, I created a new branch from my last one, and then committed all of my changes -- but then noticed some files weren't included, so I didn't push the committed changes to GitHub.

Then I did something stupid (okay, several panic-induced stupid things); I don't remember what, but the result was that all of my files in AS were reverted back to my last month-old pushed version. All of my changes since then are gone.

Is there any way to get my changed files back? Did the commit save them somewhere on my computer where they can be retrieved?