I live in spain and i suspect i was bitten by a spider on fri/sat. symtoms seem to match a Brown Recluse Spider bite, commonly found in Valencia area Spain where i am. I didnt notice for some time later when i developed an itchy skin irritation on sat night. i had what looked like a little bit mark surrounded by a red area that has spread bigger and bigger rapidly with tracking line up into my armpit. now the redness has covered most of my arm and the bite area is a hard area. i have been taking antihistamine but the redness is still spreading. I have now in the last couple of hours developed a red spotty rash all over my body like measles/heat rash. i have not experienced dizziness or nausea or anything. Do you think the rash is related to the bite? What should i do?