My left breast for 3days now are sore/swollen with both areola's darker followed by 2 irregular cycles I feel no lumps in breast I'm concerned, help?

Exam. It's difficult to say what is happening, but you should have an examination by a medical practitioner. Soreness of a single breast could possibly be a sign of pregnancy, if you are active in that way, but usually it is both breasts. Please take care of this so you won't have to worry.