I traveled to a new country for a short business trip of 3 to 4 weeks. Today is my fifth day, and I am having problems to sleep at night from these past five days. As a precaution, I carried Melatonin and Zolfresh with me. Can I take 10 mg Zolfresh to get proper sleep? I took Melatonin last time, but it was not effective. When should I take Zolfresh? Will it help regulate my sleep cycle? My head is paining, and my eyes are burning due to lack of sleep.