I have no advice that is on-point to your question, but I wanted to say hi and offer hugs.
My DH was diagnosed with a brain tumor in May 2011 as well. I was 14ish weeks pregnant at the time. My DH had a complete resection (high grade II astrocytoma) at that time. They told us that it almost certainly would come back, but that we had an average of 7 years until recurrence. Also, I had some complications during delivery of that pregnancy, and our son passed away while I was in labor.
Fast forward to this November. I am pregnant again, and a routine MRI turned up new growth (only 18 months later). DH had surgery 2 weeks ago to remove the new tumor. We are waiting on a second opinion on the pathology, but it looks like Grade III.
DH will be starting radiation AND Temodar when I am 34 weeks.
I haven't met many people who can relate to what we are going through, so I just wanted to reach out and say hi, and let you know that you are welcome to PM me at any time.