I am a 28 year old female and I noticed a bit of a swelling in my left armpit but only when my arm is raised above my head I can feel it. I noticed it when I was lying in bed and I had an itch near the area. The other side seems to have a similar structure but not swollen. It's not a lump more of a hardish swelling. I went to the Drs today and I saw a female Dr who said that she's seen a lot of women who have had their covid booster in the same arm that they have similar swelling to mine. She said to keep an eye on it for approx a month and go back in Jan if it hasn't gone down. She said she isn't worried, it's not a lump, not a lymph node, just a general soft tissue swelling. She also said that she didn't want to refer me for any unnecessary investigations at this point in time and only if it doesn't go down will she refer for possible ultrasound and maybe breast clinic. I have really bad health anxiety and I'm so worried about waiting to see if it will go down. It's been there 3 weeks now and hasn't gone down so I can't see it going down over the next month. I'm worried it will impact my Christmas because I will be worrying about it. I'm contemplating ringing the Drs again and getting booked in to tell them how worried I am about it.