Cannot sleep well cant sleep even one minute after 4

Patient: I did’nt get the proper sleep last some days… am working on shift wise so i need to take night shift also .. but now last one week iam in morning shift then too i cant sleep well .. i go for bed at 10 then i get sleep with in one hour or two hour that means around 11….11:30.. but my sleep will stop after 2..3 hour means 2 am or 3 am i wake up and i feel so tensed and worried about unknown issue.. please help me.. what i need to to do fo better sleep.. i dont want to take any medicine…. also i eat well.. am doing excersis twis in week depends up on my duty time…. please help me

Symptoms: Sleep

Doctor: