Swollen area in supraclavicular area

Just wondering if anyone else has been through the same. For 2 months now I've had puffiness/swelling in the area between collar bone and neck. Went to GP yesterday and she's referred for ultrasound with 2 weeks wait and ordered bloods (have to wait 4 weeks for that ?!) she said she can't feel any hardness it's soft by definitely swollen and asymmetrical compared to the other side. I pulled a muscle in my neck before Xmas so had thought about it being that but Dr didn't think so. She said possible lipoma, soft tissue growth or nodes but can't feel them. Now in the worrying wait for a scan appointment.