My skin is burning bad and I have rashes under my arms!?

IDK rather or not I have eczema but I've been breaking out a lot this winter. It seems to have started at the end of November maybe early december. I seem to be allergic to everything. it feels as though something is crawling in my skin. I broke out all along my bra line,on the side of my . under my ,sometimes my forearm. I have really sensitive skin and 2 of my aunts have eczema and my grandma. What could this be?I've gone through 6 different deodorant brands all of them burn me or give me a rash. There's also a boiler bump on my , it's gone now but it came twice,the rash and my skin gets worst at night time, and it's not bugs, and I have no medical insurance!...Thanks