Lump in breast

Hi all,

I have noticed a lump behind nipple maybe the past 3 weeks. It's hard but I can only few it between fingers. If I press on breast I don't feel It. I have itchy nipple and my nipple pushes in and stays there. Eventually it pops out again. I do have swollen lymph nodes in my neck and front of ear. But none in armpits. 
I have had a lot of different health issues over the past few years and currently in a nvestigation for other things and am a bit reluctant to now tell doctor about this lump I have found. 
 

do you think I should contact them or let it be for another while. 
 

thank you