Ben, you will be more than fine, you are headed for great things!
WOW you started at 30%??? I am even more impressed now! That is truly astonishing. Excellent work! I hear you, running a caloric deficit for so long AND working your body to the limit every day is unbelievably taxing. When people ask me what kind of workout is needed to get ripped I'm like "oh man you don't really want to hear this but..." LOL! That old saying "abs are made in the kitchen" is 100% accurate! I have some friends at CrossFit who are very strong and fit but don't look it at all because they refuse to give up beer and Mexican food They no doubt have a hard, chiseled physique under there but it's hiding under inches of fat. Can't see it until that's stripped away! Anyway let me know what your final reading ends up at, 8% would be incredible, that's getting into bodybuilder contest prep territory!