Anyone have fibrocystic breast disease?

So I just got diagnosed with fibrocystic breast disease. My PCP noticed that I had lumpy breast tissue. I thought that all people had super painful and tender breasts around their period. I also thought that people’s breasts were a tiny bit lumpy too. Now that I know this I’m a little self conscious about my breasts because they don’t feel “normal.” It’s definitely affecting my confidence.

So two questions:

1. Ladies with this disease: how do you manage it on a physical and mental level?

2. How do I differentiate between my normal fibrocystic tissue and something that’s harmful?