Noted your short and specific history about hard and large lumps on both rib cages, makes you tired, and in pains, your Doctors have no clue as to what these are.
Hence I would advise you the following:
Consult an Orthopedic Surgeon for clinical examination.
Insist for CT scan
of the affected area and guided FNAC that is fine needle aspiration cytology.
Also go for X-ray of pelvis and skull bones, these bones being flat.
All these will surely lead to a proper diagnosis and then only a proper management is possible.
Till then take an anti-inflammatory medications with painkiller properties for control of inflammation and pain.
Hope I have answered your query. Let me know if I can assist you further.
Dr. T Chandrakant, ENT & General Surgeon