I was diagnosed with one after I was sent for an MRI for high prolactin levels and a few other abnormal tests (which were missread) a few years back. This let to a heap of misdiagnoses. And a second MRI revealed it had dissappeared on it's own. I was sent to an endocrinologist, but not until I needed a second opinion- a local physician was trying to handle it on her own- made me very sick! So I would demand to get seen by an endocrinolgist, and secondly if no symptoms and tumour is tiny then I'd leave it be and get a re scan a month or so later. But if big you will definitely need to see an endocrinologist and they will refer you to to have surgery if need be, as they can shrink certain one's with drugs
Em... don't answer if you don't want to, but did your prolactin levels sort themselves out on their own? Mine was elevated on all the BT's we had during the two years before we had DD1, and are still elevated now 18 months after her birth. I have found that my local GP knows didly squat about prolactin and fertility in general.