I would say that this issue is not really your fault. Can you get on board with that? Ok good.
You need to make a shortcut to the Valheim executable and add -console to the end. Boot up game, start it up.
type F5 to bring up console.
devcommands
god to become invulnerable.
you can now use the goto x,y command to teleport yourself. First number negative values are to the left of your spawn point on the map, positive to the right. I think positive is Up and negative is down for the second. It will take some trial and error.

Now you can get your stuff, go back to base, deactivate god mode, devcommands off and reclaim your game.
Yes it is cheating. If you'd rather start over due to a bug, thats up to you.