In Terraria, when I beat the Wall of Flesh and activate hardmode, do I lose all my stuff?

I read online something about how the world changes. Two questions:

  • Do I lose my gear I'm carrying?
  • Do I lose my house or treasure chests in it?

Solution 1:

Nope

Everything you have done is still there, you just get a streak of Hallow and Corruption that both start at spawn location but down in the hell level that go up and to the right and left (randomly which one goes which way) forming a big V.

The mobs that spawn now include the hard mode mobs as well so the world overall is now more dangerous, but you still have all your gear.