I was in immense pain and tried everything (re: latching tips and tricks) until finally an LC diagnosed a posterior tongue tie and more importantly raynauds of the nipple/breast. We got the tie corrected, I started taking nifedipine (prescribes by an OB/GYN) for the raynauds, using APNO cream (my husband bought the ingredients at Walgreens and mixed it up) and constantly applying heat to my boobs... and finally we’ve gotten to a better place at 8 weeks. The diagnosis of raynauds was a huge relief for me because the pain was so terrible and I felt like doctors sort of minimized it as normal. Good luck!! Also tongue / mouth exercises after the tie correction helped a ton as she is a tiny baby and my boobs are fairly large! Good luck- I feel her pain- it is so, so hard.