parasites emit toxic ammonia - when it gets into the blood stream it affects how we feel. I don't think that you can separate health and emotions - it is all one thing. Stress releases negative chemicals and being happy releases good hormones into our system.
Maybe the hair analysis picked up on a special kind of ammonia or chemical that comes from parasites.
I have heard that one parasite cleanse will not do it for parasites. The first time of cleansing can take 6 months to a year depending on what kind, how many, diet and lifestyle, how long the person has had them... and more factors.
Whatever you do, start drinking more water right away. Health experts say we need 1/2 our weight in ozs. of water each day, so if you weigh 100 pounds you need 50 ozs of water a day.