Poison

So I cut the lawn a week ago Wednesday and now I am riddled with Poison Oak. The last 24 hours have been tough with new outbreaks on my legs and nothing will relieve the itching. I'm worried its going to get much worse...like when I was 9 and had to go to the hospital for a shot of Cortisone. I have a tree by the road where the Poison Oak is growing. First chance I get when its dormant...it's going to die!!! Yesterday I was probably only covered 5% but as of this morning I would say 15% of my body is covered and its reaching up toward my torso.