Deb, you are in my thoughts and prayers. Please get a second opinion.
My grandmother had brain cancer, lung cancer (she lost a lung), skin cancer and ovarian or cervical cancer. They told her when I was born she had 6 months to live. She passed away a few years ago from something totally unrelated.
Although this is hard news, focus on the good. The brain cancer is in remission. Celebrate that as best you can.
Great news on the remission! I am confident that you are going to fight this with every fiber of your being. I will keep you and your family in my prayers.