Breast lump

Hi

im looking for bit or support. Last week I found a lump in my left breast and panicked. So I've spent the last couple days in such a state of anxiety. I'm in late 30s. 
I recently lost my auntie to breast cancer so still grieving and this has heightened all these fillings and not coping too well. 

I went to mh gp today who said it felt like lumpy breast tissue but he was putting me on a two week referral. 

Im still waiting on my app, but wondered if someone can please share their experience of what to expect at the breast clinic and if I might get an answers as to what it might be please? 
 

thank you.  
 

Casey x