I have been having pain in just one spot of my breast for 2 year now, i have done mamogram which say?

i should do another one in a year time which was due 4 months ago but then i was pregnant and now breastfeeding my baby, though the pain still persist on that same spot (non cyclical but not on a daily basis, most times weekly or two weeks interval) and few itches after wearing bra for more than 12 hrs, no lump, am 34 years, no history of cancer in my family but confused, should i go for another mamo while breastfeeding or could it be something else