I might have just git-committed the cardinal developer sin: not multiplying estimates by 3. Torvalds help me!

So a php app I developed a few months ago when I was first starting as a dev needs an upgrade. Pretty simple since I've known about said upgrade for a while, but the feature was never needed until today.

Told my boss it would take a day or two of refactoring and additions for it to work.

How screwed am I?