I’m no doctor, but is sounds as if you have Seasonal Affective Disorder. A simple Google search will tell you more about it.
I would suggest going to see a doctor, and prayer. Don’t worry, you are far from the only person that is affected by this, and it is treatable. But, as has already been stressed: see a doctor ASAP! :hug1:
God Bless you.
Edit: And now I see that you weren’t looking for a diagnosis. That’s what I get for being a slow typist.
In that case, a prayer for you:
Good St. Dymphna, you placed all your hope in Christ’s promises, and sacrificed even your life in that hope. The Lord, God, rewarded your constancy by making your name known and loved over many centuries by the thousands whom you have aided in time of difficulty. Please assist us now in our present necessity, and intercede before God for our intentions. Obtain for us a firm hope like your own in God’s unfailing protection. Amen.