Painful feedings on just the right boob?

Hey guys. Last night both my breasts were pretty large with milk since grandma was watching LO all day. My right was a little sensitive. I figured I just needed to get the milk out. I pumped until no more milk was coming out (about 10 minutes) with 6 oz from the right. But it was still swollen. It was a little painful to pump too, so I didn’t want to try to keep pumping. The soreness didn’t go away. I took a warm shower to try to relieve the pain. Which it did a little. But it’s still sensitive to touch. Now when my LO feeds on that breast it’s very painful. Any tips on relief?