Like Casandra, lows make me want to binge, too. If I eat to correct a low, I will feel perpetually hungry, turn into a werewolf, and raid my fridge. This is not productive.
I've used orange juice to fix lows so much that I HATE the taste of it because I pair it up with the less-than-fun sensations that come with being low.
bac0s, you could have done much worse. Three cookies is nothing compared to, say, six... or thirty. Congrats for being able to stop yourself.
I've found it can be so easy to gain weight as a diabetic if you're not careful because of all the lows that can arrive with an active lifestyle. For instance, I started a maintenance/repair business, so I've been doing A LOT of physical work. With physical work (AND the Texas heat), I've been getting lows all the time. I gained a few pounds -- pounds I worked very hard to lose and keep off -- which will come off again in time.
Life is a big experiment, no?