Can't seem to commit

There is probably an easy solution to this but I'm seeing something really weird... I can't seem to commit anything to my new branch. When I try to commit it just says "no changes added to commit (use "git add" and/or "git commit -a")" When I try to do git add it doesn't seem to do anything. When I try to push it says "Everything up-to-date", but when I look at the branch on github my files aren't there. Strangely I was able to do everything fine with a different branch I created afterwards.