You've been on a solid 6 month cut. You need time off. Your hormones are probably ****ed and need to settle.
What are your cheat meals like?
If you've been getting sick then odds are your immune system is suppressed. Too much systemic stress. 6 day/week resistance training on a cut will do that.
Take 2 weeks off the diet. Eat clean just eat more. Cut down on the workouts. Maybe just do 2 workouts a week and make them mild intensity full body.
After that go back on the diet and workout plan and see what happens.