Hello.
My name is Megan. I have been juicing every day and have been feeling so much better too. The symptoms that your having sound very much like Candida to me. I used to have Candida and finally beat it. They have a Candida form on here. Another cause could be your liver is detoxing, which can make you feel pretty crappy. Especially with the beets, they really detox the liver. I put garlic and coconut oil in my juice, aloe vera juice as well and flax seed oil, which is all very good at getting rid of Candida. You may already know this. I am just trying to help. Feel free to write.