Suggest Remedy For Lump On Supra Sternal Notch

Hi, I am worried about a lumpiness in my supra sternal notch that I found about a month ago. I guess you could say it's a lump. It's not painful. I do have a history of cervical cancer in 2014 that was treated with surgery. Just wondering what you think. I was wondering if I should just wait till my next appointment in March.