Apocalypse: This Pocket Dimension Is Pretty Huge

I was searching for supplies in a small supermarket when a group of low-level zombies trapped me, and I passed out from hunger! Passing out was bad enough, but when I woke up, I was told I'd been bitten and was about to join the zombie horde. What is this nonsense? And as if that weren't enough, the childhood sweetheart I'd grown up with for over ten years turns out not to like me? Wait, fine, he doesn't like me, but why throw me back into a horde of zombies? I was practically dead when I awakened an ability. What is going on here?!