Propecia - sides, lump in armpit

[Mb1988]

Hi everyone,

Looking for some advice on fin/propecia and sides.

I started taking propecia around 16 days ago and 2 days ago noticed a lump under my armpit and it feels tender. I went to the doctor today who seems really concerned and is sending me for an ultrasound and blood tests as he thinks it could be breast cancer.

I’ve read about the sides of propecia and lumps is one of them, I’m wondering if the lump could be caused be the propecia. I wondered if anyone had experienced any similar lumps? Did it go when you stopped taking or did you continue?

Thanks in advance