Painful boob

Hi mamas im having a bad pain in my left boob with left arm and back too its been today morning the still here and hoing worse and persistent i don't know what to as i can't tolerate the pain right now please give me advice.... I know I should go to hospital but today is Sunday and i can't make an appointment tomorrow will definitely do this but right now i wanna try some thing in hone to minimize the pain and also is there anybody know what is this please im in pain right now typing this