Hi Michelle,
I can relate to you about finding it hard to be patient with your dad when he looks well. If your dad wanted to get back to work, let him do it. I doubt he can do it as well due to the side effects of chemo and radio therapy. Anyway, life is too short to do things you don't want to. Your dad may think that he will beat this thing and lives his life as normal but truth is it will stick with him forever.
Life with GBM is like a roller coaster ride. It may seem to be a smooth one sometimes but there are always up and down time. I have only experience this the past 7 months. My partner was diagnosed with GBM in August last year. He appeared to be fine during the first 3 weeks of radio therapy. However, his energy level dropped big time in the 2nd half. Once he was well enough, here came the chemo time. The first round was OK as the dose was lower than the following rounds. He's finished his 4th round a couple of weeks ago and at the moment not doing so well in terms of energy level and strength. By the time he feels well enough, he will be knocked down with the 5th round of chemo. Well, I can't give you much advice. Just hang in there and be patient. I know it's not easy and if it helps, try talk to people about how you feel I find it helpful for me to deal with this situation.
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