Please read.. Swollen lymph node disappearing.. Good sign?

So I've had a swollen lymph node for almost 5 weeks in the right groin area. It's a hard moveable lump but it seems to be getting smaller,it doesn't cause me pain. It hasn't increased in size either! I never went to the doctor but should I worry even though it's getting smaller? I haven't been sick and I really don't know why it is swollen.