Breast pain - waiting for appointment at cancer unit but the pain is now unbearable. Does anyone have any suggestions on what can help?

On Boxing Day, my nipple started really hurting, then a lump formed under my areola. I went doctors on the 29th, he referred me to the cancer unit (which I now have an appointment for the 16th of January) however since then, the pain in now unbearable, I have a pinkish rash around my areola and then a rash that appears to follow a vein up to my armpit, which is now also hurting. Not pregnant or breast feeding and no fever. I honestly don’t think I can cope with this pain for another 2 weeks! Any suggestions on what can help or what this even could be? I’m going out of my mind! TIA