Insomnia is my number one side effect with pred. Other people experience blood sugar spikes, irritability, jittery feelings, soreness, and hunger. Honestly, my side effects are pretty limited and I feel very lucky, but I do sometimes get almost uncontrollable food cravings. It's like I have to stuff SOMETHING in my mouth right away.
What dose are you on? The amount of pred makes a HUGE difference in my experience. I am on 10mg all the time and bursts normally start out at 60mg for me. By the time I hit 20 mg again I feel more or less back to normal. Hopefully since it's a short burst the starting dose isn't too high?
Good luck. I always call pred my "evil little miracle" -- it works wonders, but I hate being on high doses. Just remember to STAY AWAY from sick people when you're on it, b/c it does lower your immune system. Hope you feel better soon and get away with minimal effects!