Sorry for your loss.

Quote Originally Posted by snickersnake View Post
Anyway, I want to know what I did wrong.
Quite probably nothing. But none of us can tell you that for certain. You've missed some details in how you've kept her though, so if you want more answers you'll need to fill some gaps -
What temperatures did you keep her at (hot and cold sides)?
How old was she? What species? What did she weigh and how long was she?
Has she been eating normally over the last month? When you say the worms were small, how big were they?
Any external signs of trauma? Any lumps or bumps you can feel anywhere on her body? Any problems shedding recently?

Many of us have lost young snakes unexpectedly, the cause is rarely clear. I don't know how many have died from over-feeding, but suspect that would not be the cause of death.