Living with Sarcoidosis

hope you can help please. For the past 4-5 yrs. i have been getting blisters on the palm of my hand and they break through the skin. And now, the past year, the blisters have been getting on my toes and hand and they still break through the skin. but i also get them on my spine but the ones on my spine do not break the skin, they are just right under the skin.. so all these blisters appear at the same time and i get a real bad headache and I throw-up a lot and run a fever. a red streak goes up my arm and my hand will swell. and they come often, and they last about 2-3 weeks and just as soon as one goes away another one comes up. They are very painful. I have had 6-8 biopsies and they don’t know what it is. every one of the tests are negative for herpes virus and shingles I have gone to the rheu. arth. dr’s and derm. and still they don’t know what it is.. please help: it’s getting worse, and worse each day. my joints hurt real bad when i have the blisters. and sometimes spots on my ribs hurt and my chest will hurt also…i can’t think of anything else right now. please help asap and tell me what else i need to do. the blisters come and go real real often….