Gosh @merit.ahama ! It does indeed sound like you have a sleeping problem as you say ! But how do you feel in the middle of the day, do you ever get tired ? After that, if you're fit like that, it might just be your normal rhythm, but even I who need at least 4/5 six hours and 6/7 to be comfortable, it seems very little !
Have you ever tried taking melatonin hormone ? I know it's the one we excrete during sleep and it's worked really well for relatives.
Thanks for your input and I hope you find the balance you are looking for..! Be well and see you soon :)