Thanks for sharing your question and welcome to EmpowHER! I am glad you found us.
Breast pain can be cause be a variety of things, and some women do experience a condition called fibrocystic breasts. With fibrocystic breasts, breast pain can worsen during certain times of the month.
Have you noticed that your breasts hurt more at certain times of the month? If so, is it usually always around the same time, or does it differ for you?
Fibrocystic breasts can have several lumps in each breast which are really cysts filled with fluid, and not necessarily cancerous. These lumps are typically more tender right before you begin your period.
I think it is important that you set up an appointment with a physician. What you have described sounds similar to fibrocystic breasts, but I am not completely sure. A doctor's appointment would be a great idea to talk with a doctor face to face, tell them about your symptoms and concerns, discuss the possibility of fibrocystic breasts, and discuss what you can do.
I recommend writing down your symptoms and all of your questions prior to your appointment so you don't forget anything, which can tend to happen if you are nervous during an appointment.
Especially at 20 years old, I think it is a good time to set up a physical with your doctor and discuss what you have been experiencing.
Here are also a few resources on EmpowHER that may be helpful to read:
Let me know how your appointment goes and please keep us updated!