HOW can I return to a continous & deep sleep during 8 hours?

Hi, I am 45 years old, I always had needed to sleep to late, when I were 30 years old I slept at 2am., for example, and I woke up at 11am in a continous and deep sleep .
But since several years I sleep at 2am and wake up at 7 or 8am (very sensitive to any noise)
tossing and turning in bed until 9am or 10am when I can finally sleep again until 2 or 3 pm.
It's obvius that I have DSPS.

Then HOW can I return to a continous and deep sleep between 2am and 11pm????
and HOW could I return to sleep at 10pm like many people?

I had taken melatonin with bad results, I believe that I sleep just 10% more with the melatonin.

Sincerely I would like to have chloroform beside my bed when I wake up early in the morning with only 5 hours of sleep .

Beforehand. Thanks by your answers .

I think it's worth seeing a doctor or sleep clinic, Behrens. If this is DSPS then it may not respond to the usual insomnia approaches. If it isn't, then they can give you a more relevant diagnosis and relevant suggestions for tackling it.

Ada wrote:I think it's worth seeing a doctor or sleep clinic, Behrens. If this is DSPS then it may not respond to the usual insomnia approaches. If it isn't, then they can give you a more relevant diagnosis and relevant suggestions for tackling it.

Thanks, Ada. I will search for a sleep clinic in my country (Venezuela) but I believe that it's so much expensive , that´s the reason why I wrote here.

All started when I refused to sleep early (10pm), studying, playing guitar, watching TV, etc. when I were 20 or 30 years old. But when I got a woman and I had my daughter (when I were 35 years old) my sleep became in a light sleep. Now my eyes had rings and I need to sleep until 4pm to feel well, to feel rested.