1st cleanse, feeling like CRAP, need advice!!

So just over a week and half ago i started the bowel cleanse. i cleaned up my diet A LOT when istarted this and have been really good ever since. I cut caffiene out of my diet. i tapered off first.ive cut as much refined Sugar out as i can, im eating tons and tons of vegetables, soups, salad, fruits, fresh fish, and lots of whole grains flaxseed bread and coconut oils and what not. very little dairy, and really no red meat. ive lost about 10 pounds already which is kinda drastic. im only doing one shake per morning. ive been planning to up it .

but my question is this: i FEEL LIKE CRAP!!! ive had a headache this entire time! just right behind my eyes.and im practically exausted! i thought at first it could be the caffiene withdrawl but its been almost 2 weeeks ive quit coffee before and it hasnt taken this long. also i am sooo tired. i nap every single day! im only 21 years old! whats going on with my body right now? am i missing something in my diet? or do you think that now that my body is detoxing so harshly its making me sick? im trying to think of the possibilties. im not excercising that much cus im a bit tired after a days work, and i still seem to be losing weight, but excercise doesnt seem to really elevate my moood at the moment. i feel dizzy and just out of it. brain fog. its pretty crappy. i feel so slow. what can i do?? is it possible that now im eating so healthy my body can actually feel the sickness from parasites? im really digging deep trying to find whats going on. yoga doesnt help relax me right now. please any advice!!!!
kate