Pain in nipple & breast

Brandi • Married to bff || 2 boys & 1 girl

My son is almost 4 months and for the last couple of weeks, off and on, I've been experiencing pain in my right nipple and deep in my breast. It occurs during feeding and for awhile after. I'm not sure if it's a latching issue or if it's something else going on. Has anyone ever experienced what I'm talking about? Who do i see about getting this fixed?