Fibroadenoma at 44?

I'm currently waiting for my biopsy results. The doctor said the lump looks like benign , fibroadenoma. But Im already down the dumps to say the least .. I've been Googling at it appears to me this occurs in young women . Im not... I noticed a lump 2 months ago is like an oval hard stone in my left upper side about 5cm(1.95 inch) I've never had any lumps when I was younger or I was t aware. It wasn't there 2 years ago when I had my first mammogram. Just 1 day I felt this big lump, 2 months ago, not noticed anything prior. Im thinking the worst despite what they said. Self diagnosed phyllodes based on my  intense google search. 
how likely is to get fibroadenoma in your 40s when never had when I was young? 
feel like I'm in a nightmare but can't wake up