Breast lump, implants and urgent refferal

Hi, 

I have been having some pain in one breast for a few weeks so decided to go see the GP.

Went to see her on 24th Feb and she found some hard tissue and a lump where the pain is. 

She sent me for an urgent refferal to the breast clinic and I have that appointment this Thursday coming. 

I have been a complete mess since the GP appointment as I couldn't feel the lump just a bit of the hard tissue so it took me by surprise and has just freaked me out. 

I have breast implants and have had them for around 11 years, had no problems with them at all and all has been good. 

Has anyone else been in the same situation as me with this? Will the implants affect the ultrasound I'm going to have on Thursday?