worsening pain in abdomen arm and neck

I have had pain and stiffness in my left hip for a number of years after a longterm infection from ingrown nail (which was removed). For the last eight months this pain has worsened and i have been getting groin and abdomen pain(pcos was ruled out), i have also experienced pain in my left armpit for several years which was made worse after i used chemical type deodorants for excessive sweating, this has also become worse, with numbness in my arm and sharp pains. These pains used to be intermittent/occasional but are now more consistent. Recently i have noticed a small hard lump behind and just under my right ear, about an inch wide.I am suffering anxiety due to worrying about these things. My doctor didn't seem to know what to tell me at all.