Dear mothers. Good evening. I breastfeed my son and daughter. I feed m…

Dear mothers. Good evening. I breastfeed my son and daughter. I feed my son 1-2 times a day. I didn't breastfeed yesterday. My breast hurt all day, I expressed milk, it didn't help, the milk didn't decrease. I have a lump on my left breast. I don't know what it is. I also fed my son. The milk became normal. But my breast still hurts. It's exactly where this lump is. Is it because of it or because I was carrying full breasts all day and now it's like recovering milk? What do you think?