Why do I have painful breasts?

I have now since three weeks painful breasts, the first week was very little pain and the second more and now this week i have a lot of pain, and the most painful is when i dont wear a bra. I read that mostly it is before menstruation but i never had this much pain, moving or touching it hurts.

Shall i wait until im on my period and then look if i have still the pain? Or shall i speak with the doctor already if its concerning?
Why do I have painful breasts?
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