Hello! I am just after some reassurance really   I am 21year old 

In July I noticed a lump in my right armpit, it was quite painful and did result in me having pain when pushing or pulling a door. 
The month before I did have a cyst of sometime in the same armpit which got diagnosed over the phone from my gp. This was not avtually checked out. 
abyway, time has passed I have got in touch with my doctors so many times and they have checked my lump and sid it was a lymph node, if it doesn't go down come back in 2w. Well 2w passed and turned into 3 months of trying to get somewhere with my doctors. Finally yesterday I had a breast clinic appointment where I got my breasts examined and had an ultrasound on my armpit. They noticed the lymph node was enlarged but only by 1mm so they really didn't seem concerned. They want a follow up in 6 weeks to check it is shrinking and will be happy even if it shrinks 0.33mm 

if not a biopsy will need to be done to understand why. 
i am just wondering if anyone has any advice or reassuring comments from experience as Ofcourse I have disorganised myself my lymphoma. 
i do have high prolactin which is under investigation at the moment with my doctors but other than that I am supposedly fit and healthy. 
i did have my vaccine in July (16th) and found this lump July 20th but it could of been there way before as I only really checked because it was hurting still.