It may be morgellons. 75percent of people do not get the sores. Read up about it and determine if that could be your problem
a good new book is by Dr Ginger Savelly.
get a 60x mini microscope (they are about $10) the kind the jewelers use and check your nails to see if you have black or colored filaments under or around the nails. If you have this then you have morgellons. It is associated with lyme disease. It is a co infection that passes between 6 and 10% of lyme patients have it. You probably had a problem increasingly getting worse.
treatment is ivermectin and albendazole and doxy . the book lists the various things that can be used.