This is going to sound funny, but when I had a similar situation, I called my grandma (She works for wic as a lactaction consultant) she told me to use warm washcloths for 10 minutes then get on all 4s (like a dog) and try to squeeze the milk out, and let gravity do the work of getting the milk out. It worked, but it was really uncomfortable lol

Pretty much everything you're doing already D; it sucks so much I had it for like 3 days. Lots of massaging and heat packs helped.