There are no second by second logs for D2, D2R or D3 so they don’t have restoration services of any sort for these games. No matter the reason.
As for losing your items there are a couple options to consider:
- You hit W and swapped your weapons. You have two weapons tabs and if you hit W it switches to the other one which might have none if you are not familiar with it.
- You died and had issues with getting the right body back.
- The game just plain bugged and stuff vanished?
Read the death mechanics carefully
http://classic.battle.net/diablo2exp/basics/characters.shtml