So I've been way to focused on not dying, I forgot to check what skills I had just unlocked when I leveled up. I had gotten out of my game a short while later and when I returned I realized I didn't check what I unlocked :( Is there a way to see recent unlocks for your character? Instead of going back through each skill guessing what the unlock might have been.
Go to the Diablo 3 Game Guide. Each class has a "Progression" tab, that will show you exactly what skills, runes, and passives you unlock at each level.
There is no way in-game to see what you recently unlocked.
In the skills tab, there should be a "NEW" tag above each new skill (or skill with a new rune), and above the passives if you've gotten a new passive. If you open a specific skill page or the passives page, the tag should appear above the particular runes/passives that were unlocked. These will only go away if you mouse over the new skill/rune/passive.