Proper sleep disorders diagnosis is very important. Stress and anxiety may cause sleeping problems. Moreover having an anxiety disorder exacerbates the problem. Typically sleep disorders are characterized by abnormal sleep patterns, which interfere with emotional and mental functioning. Insomnia is the clinical term for people who have trouble falling asleep. There are several sleep disorders that can affect the quality of your sleep and result in daytime sleepiness, regardless of whether you have spent enough time in bed.