Well... instead of just tossing rude names at you I thought it might be useful to give you a hint that might actually help, without spoiling to much. Yes dying sucks and yes the swamp is quite an increase on the difficulty scale after the dark forest. Like others have mentioned, your best bet is portals (to your main base for a better corpse run) at the edge of the swamp, fortified behind a simple palisade or something. Also try to aquire neck tails, charcoal and honey to brew poison resistance mead to mitigate the poison of leeches and slimes. If you are new to the game, run away from draugr with one or two stars... especially if they happen to be elite draugr (they will slaughter you if all you have is bronze tier armour). Another way to avoid leeches is by using the hoe to make a dry pathway through the swamp. This will help you aquire a safe retreat route and prevent being stuck in a pool of water and being gancked by everything that can still use their weapons whilst being submerged in water (in short everything that isn't you). Most importantly if it is your first time in the swamp... don't traverse the swamp at night. I hope this was more useful than just calling you rude names and asking you to uninstall the game and all the other usual stuff you get to hear in game forums.

Oh and if you see the occasional fire geyser here and there, try mining them out until they are flooded with water. Those are surtling spawners and thanks to the water the surtlings will die in no time, giving you a source of infinite charcoal and surtling cores. I guess you'll get past this annoyance/hurdle once you aquire iron armour. Despite some of the hostile reations here, we've all been there ourselves. So no reason to bash yourself over it. The plains will be far worse in that regard. In future try to keep some armour and equipment in spare for corpse runs... as you now know firsthand, how much it can suck.^^