Yesterday morning something bit me on the underside of my forearm near my wrist, over a vein. It hurt when it bit me but by the time I looked down, whatever it was, was gone. However, the location of the bite immediately swelled up and a rash spread from the site all the way around the side of my arm from elbow to wrist. The rash went away within a few hours but I have pain (a throbbing ache) that goes from my shoulder to my fingertips. Today the site is a small red bump with a blister type head on it. When I popped it, it turned into a crater with a dark dot in the middle. The area around the site and around my wrist area is hard as a rock and hot to the touch, with some swelling. Should I go get it checked out or is there a way to remove the venom from whatever bit me?