Hey, I Am A 27 Year Old Male, Who Is

Hey, i am a 27 year old male, who is reasonably fit. I recently discovered a hard tender lump under my nipple, I went to the doctor who sent me for an ultrasound, who confirmed it is mild gynecomastia , he then ran bloods to check my hormone levels, which came back as higher then ranges for males in prolactin and creatine, when I got these results I had to see another doctors then my usual cause he was booked out when my results came in, he told me to not worry about it and it will go away in a month, i just wanted to check if this is true, cause it's not what the doctor before had told me.