Hello Newtoallthis123,

You shouldn't feel silly about calling the doctor, they are there to investigate anything you're concerned about. When you are worried that you may have cancer, it can be tempting to look for answers on an online forum, but this can end up increasing anxiety rather than making you feel better. And the only person that can diagnose you is your doctor.  

I hope this is helpful,

Moderator Anastasia

Hi Newtothisall123. Welcome to this forum.

I am not a doctor and I have no medical qualifications.

As I'm sure you know, the armpit is crowded with lymph nodes (or "glands") which swell up when fighting infection.  You don't say if you've tried feeling your armpit to see if there's a swelling that's painful when you push on it, and whether or not you've got a sore throat or some other indication of infection.  Nor did you say how long you may have had this issue.

Most doctors say that a lymph node should settle down within 4-6 weeks so it's probably ok to wait for that amount of time before flagging it up, unless you have what are called "B" symptoms, which are drenching night sweats, unexplained weight loss, severe itching, and a few others.  I dare say if you had anything like that you'd have mentioned them already.