Unexplained Symptoms: Attacked by Bees and Knots on My Head

So I want to share something on here that maybe someone else gets and I can hopefully figure out. When I get hot, or have been moving stuff around, ie irritating my back, I start feeling like I'm being attacked by bees all over. I feel it on my back, my arms my stomach, my legs, my chest. Then I notice little clear bumps. I have a panic attack and freak out. It takes about 20 minutes for me to cool down my body and make it go away. I've seen my dr and a rheumatologist for this.. Noone knows what it is.. The rheumatologist just gave me muscle relaxers and thats it.. Blood tests always come back clean.. Also I have had 3 pencil eraser sized knots on the top of my head. They hurt to touch. I get headaches where they are. My drs don't know what they are either. Nor have they done tests to bother even checking them out. I have a constant issue scratching my head only when home. Like an anxiety thing. it's only in one spot usually. I don't have lice. I don't scratch when im any where else. As long as my hands are busy I don't do it. But my head feels if I were at the beach and had sand on my scalp. But only in spot. And my scalp feels kinda squishy I quess? But only on the left side near the top. I hope someone has answers for me :(