When I moved to France for 5 months for my study abroad program I had the same thing going on with me.
People's body's react differently, but best thing I found for my body was to go workout at night time, by the time I got home and made my post workout meal and ate it I was tired as hell and had to go to bed. Try melatonin to something, I know I couldn't take that stuff because it gave me weird ass dreams but may help you.
The jetlag did stay for about a week or so though, so it's not uncommon, may go away soon.
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