Low level warrior issues...
Karma is as abundant as air, and as useless as the Kardashians.
Simply put you should invest in at least a few pieces of gear with toughness and vitality. Once you hit level 11 you can begin traiting for toughness as well which helps immensely. I have toyed around with quite a few classes and nothing comes close to the survivability of my warrior (level 35 currently). Granted my guardian is only level 8.
Your warrior seems to be built as a glass cannon so expect to take some damage if you roll with only power/precision gear and those weapon choices (GS & Axe/Axe). I personally roll with Hammer and Rifle and love the control Hammer offers.