Re: trying to make a decision...
Hello! I personally have a non-functioning pituitary tumor but my mother was diagnosed with a prolactinoma over 20 years ago. What I know is that prolactinomas are very invasive but easily treated with medication. Some patients do however need surgery, but for a prolactinoma it really isn't the number one choice in most cases because they grow back so quickly and invade the nearby structures. My mom wasn't able to tolerate the medicine, so they have had to do 2 surgeries, one bout of the gamma knife radiation, and she just found out that it has grown back again. Of course, it is highly believed that it only grew back because she can not take the medication.
I understand your concern and struggles with medication, but honestly if you can handle the medication, it definitely is a better trade off than having brain surgery every few years. I would definitely try it out if you are willing.
As far as having another child, pituitary tumors do often make things difficult, however my mom was able to conceive my brother (who is now 17 and healthy) without 'planning' about 3 years after her diagnosis.