Could lymphoma appear in this way?

A few days ago I found a pea-sized, hard lump on the left side of my neck. It's low in the neck, maybe an inch up from the base where the clavicle starts. Definitely in deep, not a surface skin thing, you can't see it. It doesn't hurt at all, I found it accidentally while massaging my neck. I'm not sick that I know of. I've had a very slight fever for about four days but that's normal for this time in my cycle (I've been charting for a long time, as we've been trying to get pregnant). I always go to the worst case scenario so I was looking up the symptoms for cancers: I have experienced ups and downs with my weight for no particular reason for a few years now (I'm a bit underweight & have GERD, which is being treated ok I think). I'm always fatigued, but have attributed that to my job. I'm 30, have a family history with some breast and skin cancers in it.

Would you be going to the doc right away? Or should I keep an eye on it a while?
Thanks.

[Ken_PA]

hi, my guess is that a doc would only say to keep an eye on it

the odds that it is lymphoma are less than for other causes