Dark urine?

Hey everyone,

19-20 days ago I began Hulda Clark 's 18-day parasite cleanse, with Black-Walnut being the only herb in tincture. Throughout the entire procedure, and even up to now, my urine has been considerably dark.
Do you know why, and should I worry?
4 days ago I experienced a full remission of depressive symptoms; now, the Depression has returned with a vengeance. I'm very fatigued, sleep very poorly, and my face looks very sleep-deprived. I'm drinking lots of water--16 ounces every hour to two hours--but I still feel thirsty and moody.

Again, do any of you know what this might mean?

Thank you so much,
Dawn Tweet