A.H.
If it was nothing then and it hasn't changed, I'd say most likely it's fine. When you go in though I would ask for a CBC to be sure you don't have an elevated white blood count or anything else weird going on in your blood work, and a possible biopsy if they can't tell you with certainty this time what the lump is. Then you can be at complete peace about it and find something else to worry about. :)