Yes - don't know if it's peri related, but yes, Hungry too. Some days I remember that it's quarter to three and I haven't had anything since a bowl of cereal at seven, and that's why I'm hungry, other days there's a gnawing monster in my stomach yelling FEED ME for no apparent reason. Once upon a time I could distract myself and stick it out long enough for the feeling to go away, but now I can keep this up for a couple of days and then day three, the yelling is too loud and I am insatiable, eating everything in sight.
I have a few strategies for avoiding snack distraction, generally based on the theory that a little of what you fancy does you good. For example, if I want crisps or cheese, I am not focussing on anything else - it just goes round my head until I've had some. So eating one crisp (no more than five anyway ;-) ) or an inch cube of cheese satisfies the craving for that flavour/texture. Yes I know it's still calories, but it's better than a whole bag/block. And I've heard the theories about really being thirsty in these situations, not hungry - not so, a glass of squash does not the salty crunchy need.
Sometimes this micro snack also works to trick my body into thinking it's eaten something more substantial - just enough to get through to actual mealtime. A handful of raisins, nuts or other dried fruit works here too. I find fresh fruit less successful - love it as a sweet treat, but it does nothing to assuage the Hunger.
Lastly, I have in my office Emergency Biscuits - plain, not particularly tasty biscuits, but acceptable if I really need some food, and I'm not tempted to have more than one!
So in short, I don't have much willpower either, but am managing to limit the impact.