FTM dealing with engorgement

I’m 6 days PP, and my boobs are on fire. My milk came in on day 4 PP and has been swollen and heavy ever since. I am planning on strictly breastfeeding but my baby had to be put on a supplement diet.. until his jaundice levels are normal. I’ve tried pumping and putting baby on breast to drain my boobs but they still feel the same amount of heavy afterwards. It’s also very difficult to get him to latch when they are so full😩.. I could really use some advice on how to ease the pain and relieve some pressure!!