Just train through it. It happens to every dog, just different extremes. I can't remember my past dogs at all during that stage. Sam was awful, just crazy! Linus went from Mr. Perfect to a total space cadet. Luckily, it hadn't been that long since Sam was in that stage and I remembered that it was normal and just to power through and it seemed like we were through the other side within a month or two.
As far as training, it's not a great time to teach anything new. Just keep training sessions short, frequent and fairly simple without too many distractions. For example, it's probably not a great time to train in Home Depot right now. Increase exercise if you can.
Good luck!