Hello. I gave birth on January 6th, 2023, and it's been 10 days since …

Hello. I gave birth on January 6th, 2023, and it's been 10 days since then. The lochia were brown and infrequent already, but last night, when I was expressing milk, they started again with copious red discharge (like during menstruation). But I wouldn't say that I change them more often. Is this normal? What caused the more abundant discharge again?