Pumping and BFing

Hi ladies!

I have two questions, I'm looking for all thoughts and advice. I'm a FTM to a perfect 3w old and learning that breastfeeding is hard.

We have ditched the nipple shield (hooray) and perfected our latch. Here's our problem:

When we feed on the right breast, everything is perfect, great latch and no pain.

When we feed on the left breast, no matter what I do, it hurts, burns, and is so uncomfortable. I've tried position changes, correcting latch and using the nipple shield. It's all bad.

I'm wondering if anyone has tried feeding on one breast exclusively and pumping on the other? I'm looking to start pumping to build a supply for when I go back to work anyway.

Any advice or tips??