Swollen Lymph (Axillary) Node under left arm

2 1/2 weeks ago while taking a shower I noticed a knot under my left arm.  I showed my wife and she immediately went straight to the internet where it was coming up Lymphoma, Luekemia, and the rest of the scary stuff.  It had us worried out of our minds!  I made an appointment and got into the Doctor 2 days after the lump was found.  The doctor felt it, asked if I had any other symtoms (symptoms)-which I didn't, and told me it's benign.  She put me on Clindamycin (antibiotic) and said it was probably from some sort of infection.  I took the 2 pills a day for 10 days not missing a pill, and 3 days off medication, the lump is still there.  It's the same size and everything.  If you just run your fingers across it, it feels the size of a black eyed pea.  However, if you press down on either side it almost seems the size of an olive.  I can't really tell if it moves on it's own or if I make it.  It doesn't easily move.  It's not painful, although a little uncomfortable.  I don't really know how long it's been there, I just happened to notice it a couple of weeks ago.  

Do you think a Doctor can tell if a swollen gland is benign by feeling it?  Should I rush to another Doctor for a second opinion or just wait to see if it goes down?  From all of the information I can gather on the internet most cases I've read about swollen glands the Doctors don't order further testing unless the gland becomes larger.  I'm confused, anxious, and worried.  

[Beau1961]

If you think it is a problem you can have your Doctor ask a Surgeon to remove it.
I would listen to my doctor and wait to see if it goes away. I'm not a Doctor all I can tell you is I know how you feel. I did have Lymphoma. My Lymphnodes however did not swell up. Your doctor can also do up some bloodwork.It is great you don't have the other symptoms. I however did. Stay calm and follow up with your doctor.

Ron