a bug or a spider or something bit my foot, maybe an ant, and it was red and swollen after a few hours in a large circle around the bite, that was yesterday, today i woke up and my entire foot was swollen and red and burning and super hot now i cant even walk on it its 1.5 times the size of my other foot, i have it elevated and i took benedryl. i can barley move it its so swollen what do i do?