I love this lifestyle especially now that my body has adjusted to it. I feel amazing...and the biggest thing is that I can breathe! I was diagnosed with asthma as a kid and I can tell you that I have zero asthma symptoms when I am not eating the grains, dairy, and sugars. It is awesome. Inflammation is a terrible thing. My stomach bothered me initially when I began my first Whole30. Give it some time. Something else to consider...coconut might not set well for you. It kinda bloats my stomach. As for CrossFit...I have never done it and I'm losing weight and feeling great! Think positively. I understand your doubts and concerns, but the "normal" everyday diet of grains and such, has so many problems...and if it was working for us and helping us all to feel our best, we wouldn't be searching for something else. Read the book. It really helps to explain what certain foods are doing for your body. Give it some time. 30 days was great for me...but after 60...it was even better. You may need more time for your body to adjust. Best wishes!