Shorter days, longer nights- it's normal for the transition to winter. Makes me sleepy too, but I use Orpington Manor's approach- and those 10 minutes often turn into many.
And there's a big difference between wanting to sleep your life away and actually doing it!
Winter has such nice long nights that I get a lot more crafting and selling online done. Catch up on some reading, take a course online, learn something new! Mend clothes, make preserves, stock the freezer with meals, plan the veggie garden, draw up the plans for a new coop, clean out the closets and donate to charity - well, you get the idea. If you just set your mind to it, you can get a lot done.
I used to get depressed when winter set in- then I told myself to get over it, and that was they key. I had to learn to stop making excuses and start DOING something. It took a lot of pushing myself, but I eventually got out of the hole. Took some time, it doesn't happen overnight.
And I'd sooner die than embarass myself by having a daily pity party online in front of 44,792 people! I was raised to not hang the dirty laundry out for all to see. Only the clean laundry!