Should this be urgent breast clinic referral?

Hi

In 2022 I had a mammogram & US to investigate a thickened, lumpy area of my left breast. I was advised no abnormalities seen and just normal breast tissue. No biopsies taken.

Over time this area has gotten much bigger and is now a very large lumpy area. I visited my GP over two weeks ago and they said they would refer me to the breast clinic. They didn’t say if it would be urgent or routine and at the time I didn’t think to ask. 

I still haven’t received an appointment letter and I’m wondering if this is classified as urgent or routine referral? Wondering if I should call GP to chase but I hate causing any fuss?

I live in Scotland and in 2022 I received the breast clinic appointment within 2 weeks.