The problem is far more serious than you think. You must get rid of all the wood you bought in a hurry before it's all infected.
Just give us a time and day so we can get over there to help you out. Don't worry about recouping any money you spent as the problem will only get worse.
Based on the banded legs, I would say it's in the Pselliopus genus, which is an assassin bug like Mark said. They're generally docile but will give you an UNFORGETTABLE bite if you play rough with them... An order of magnitude more painful and long-lasting than a hornet sting. I got nipped by a wheel bug, another kind of assassin bug, about ten years ago and it was a bad scene. They're great for pest control in your garden though.