Can having a abnormally high cortisol level in your body contribute to high anxiety and depression? And what are the symptoms of having high cortisol?

Definitely. High cortisol can cause myriad signs & symptoms: fatigue, decreased energy, impaired memory, insomnia, anxiety, restlessness, crying, and depression. More info can be found at http://www.Integrativepsychiatry.Net/adrenal_fatigue.Html. I often use a specialty lab kit to test for cortisol and other adrenal hormones (saliva) as well as neurotransmitters (urine).