Felt Hungry All Day

I don't know why, but I have felt hungry off and on all day today. I wish that I could figure out why I have felt this way, I got disappointed twice today, and I've felt anxious and jittery this evening. I tried to lay down and rest but didn't have any luck at all, its like all my senses are on high alert. I went for a short walk as fast as I could and it calmed me a little bit, maybe its just energy that I'm not used to having, lol, I really don't know. I only have six days to go until my big day. Maybe that's it, a little case of the nerves, but it will pass.