Swollen lymph by collar bone?

Two days ago I noticed that I have some slightly painful swelling above my right collarbone. At first I thought it was from all the snow shoveling I did but it feels like lymph nodes now. I looked around online and it appears that this is the worst place to get swelling of lymphs. Should I go to the doctor immediately or give it a week in case it is an infection that will clear. I am 28 years old and other than this feel healthy. I am scared to death it’s going to be something life threatening.