Yes, I am going through it also - I usually experience this around the same time every year - I think it has to do with the weather and not so much sun - it just takes the body a little time to adjust to less sunlight - at least that is my opinion - I can't wait to get out of this slump because I have new fabric coming in and just can't make myself go to the sewing machine. Hang in there - we will get past this - just takes a little time.