Fibroadenoma increased in size

Hi there I'm new to the group and a little nervous about an upcoming breast clinic appt. In 2014 is was diagnosed with a fibroadenoma and have never worried about it as the are benign lumps. However I recently noticed it has grown in size so had it checked with GP who also found another lump in same breast that I wasn't aware of. Im 50 years old and I'm worried as I thought fibroadenoma s started shrinking as you got older not get bigger. I'm just dreading breast clinic appt but not too long to wait as it's on 23rd Jan. Has anybody else had a fibroadenoma that has got bigger and caused problems?