Swollen Supraclavicular Nodes

Hi, I’m 50 and have a lump in my left armpit. I went to see the gp last week who said it’s a movable lump, 4cm in size and has referring me for an ultrasound scan. When I got home i realised I hadn’t shown him my neck. On both sides my supraclavicular nodes are both swollen and noticeable. I took a picture and sent it to my gp, and he’s arranged a telephone appointment with me this Wednesday. Has anyone else experienced issues with their Supraclavicular nodes and what was the outcome please? im tired and waking up at night in a sweat but not drenching - assumed it was menopause related although that had stopped as I had started HRT couple of years ago. Any advice help or guidance would be greatly appreciated. Many thanks