Swollen Lymph Node Under Armpit

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I’m 7 days away from my period and I’ve had a swollen lymph node in my armpit/side boob area. It’s sore when I touch it and I think it feels worse because I keep messing with it 😭 everything I google just says Breast Cancer and I’m trying not to scare myself so tell me your swollen node stories please! 😩🤷🏻‍♀️ side note: we are trying to conceive but I highly highly doubt that I’m pregnant this month so I’m not even considering that a factor