I was bitten by I think a spider, not sure. I have 2 bite marks, the skin is very red, swollen, and hot to the touch. It is on my left lower leg about 6inches by 4 or so across. My main problem I can not stay awake. Since the bite 2 days ago I just want to sleep. where the bit marks the skin has a black circles. I do have numbness in my legs due to being a diabetic. My leg does itch some but today it hurts too. I did go to my doctor and she gave me an antibiotic, doxycycline 100m\ yesterday but the redness is getting worse and I just want to sleep.