it keeps getting bigger

I have a very large bite (the size of a tennis ball), on my forehead from an unknown source. I have two quarter sized bites under my hair, but still close to the BIG one. It’s hot to the touch, I have a slight fever, and I feel dizzy and nauseated. This bite has no apparent puncture wounds or bite marks. I woke up this morning with these horrid bites. Also two weeks ago I woke up with 17 bites, some were small and some were as big as a half dollar. These bites were also accompanied by a fever and nausea. I researched insect bites and flies seemed to be the main culprit for multiple bites. But this LARGE bite is very different than any I could find. I will send photos. This morning, (6:00 am), it looked like a knot from being hit, with a bruised hue to it. Now its much larger (9:15 pm), and mostly swollen and red, itches like no other bug bite I’ve had before. To the touch it is sore. I’ve taken been taking Benadryl and using rubbing alcohol on it. Should I be worried enough to see a doctor?