I am not a big fan of second opinions. I always feel like I am sneaking around my doctor's back to ask someone else if they were right. I know some people who get them routinely on just about everything. Me I have enough doctor appointments already not to want to go to any more. Sometimes my doctors send me off to see other doctors.
Apparently there are times to get a second opinion - like when you get a nasty medical diagnosis. For me it was easy, where I am treated once you get a cancer diagnosis, you get to have a day of 'being poked and prodded' by multiple doctors. In my case it was a surgeon, a medical oncologist, and radiation oncologist and finally a social worker to tell me I wasn't losing it.
Anyway, if the news from one doctor isn't good there is always the option of finding a doctor you prefer to treat you.