Way too much sleep

I talked about my jet lag when I returned from the US last month. 

I gave it about 8 days but I was already feeling okay on the 6th day after I returned. 

However, there is one difference though. I find that I get sleepy very early ever since I am back, and that it quite unusual. 

I used to sleep at about 12am and I did that for several nights alternately but I was exhausted at 8pm last night and slept till 7 this morning. 

And that’s 11 hours of sleep. It’s way too much sleep. 

It’s now 9pm and I’m again exhausted and with a headache too. 

I wonder if I’m still under jet lag, albeit slightly. 

pearlie