Visible breast ‘lump’

Hi all, new here and driving myself a little bit crazy. 
Had found a breast lump about 4 weeks ago - GP confirmed ‘thickening and lump’ and referred as USC -  have appointment in breast clinic in a week. 
Lump is now quite prominent as has grown by about 50% in last 10 days. I’ve also noticed some dimpling but only in certain positions. 
I’ve not really spoken to anyone about it as don’t want to worry my husband and hopefully will be nothing to worry about, but am panicking. 
Thanks for being a sounding board xx