I hd the same prob. My sore breast just like on/off. Cycle on April i got no sore breast , Cycle on May, i got severe sore breast and the size was double. The soreness start one/two weeks before af due. Then, in this cycle, less tha 1 week to go to say 'hello' to af, i still had no symptom of sore breast. Its just make me feel crazy with all ridiculous symptom 😢