Hey, Hallie!
Unfortunately, there's no easy fix for "carb cravings." You're talking to the queen of carb cravings.

I could sit down and eat a loaf of Italian bread from the bakery and not even blink an eye. I know where you're coming from.
Honestly, for me, it's taken practice, practice, practice. Turning down carbs one at a time. When I do, I feel so empowered. It is a high on it's own. I still have my moments, but not nearly as often as I used to.
Here's the thing with carb cravings. Eating snacks like bread, cookies, sweets, etc., makes our blood sugar spike and then fall rapidly. This triggers our body to crave more carbs the rest of the day. That's why you're not getting your "fix" and eating all day. It’s an absolutely viscous cycle. A domino effect occurs when you introduce that first carb. So, you need to quit playing dominos. But that's a decision only you can make.
Are you eating the carbs out of boredom is something you need to ask yourself. If so, you need to find other things to occupy your time. Going for a walk, a bike ride, reading a magazine...these things may sound cliche, but they work. Anything to get you away from the carbs and focus your energy on something good for you. You also need to see if you're following the plan as written. How much water are you drinking a day (plain water) in addition to the HNS? These things will impact your carb cravings.
One other thing. MRC does sell two different supplement that help with cravings. No pill is a cure-all, but they do help. One is called Guggle. It helps curb carb and salt cravings. The other is Metabolic Glucose Formula. It helps maintain normal blood sugar levels. Talk to your counselor and see which would help you more.
I hope this helps some. You CAN do this, you just have to break the cycle.
Good Luck!!!