Sleep disorder: I’ve been suffering from lack of sleep and I don’t know what to do to overcome it.

Hi everyone,
I would like to hear from you some advices regarding sleep disorder and how to boost your over-all health.
I’m 3 0 years old, male, and I’ve been suffering from sleep disorder for years.
I have difficulties to sleep at regular time. I don’t know if it is due to this that i have been experiencing many health problems, like; stomach gas, esophagitis, body pain, head ache, intestinal problems…
I am constantly concerned about my health but i don’t know what to do.
Due to poor economic conditions I can’t always have regular health check-up.