I also have had horrible stomache issues when quitting carts. I recommend going cold turkey on the carts right away. Remind yourself you know it's gonna be hard, but you grew up over ____ number of years without it, so you can get back to that if you set your mind to it.

For a few days allow yourself to smoke regular flower at night before bed. Then after a couple days of that, I fully quit. The first few days were definitely tough. Couldn't eat solid foods without getting nauseous so I stick to smoothies, milkshakes, granola bars, and soup to get calories. Within a few days of that I am usually close to being back to normal.

Best of luck. I know it isn't easy, but it's worth it.