Daylight savings time is a killer for me. I have had MS for 5 years and struggled with it getting dark early even before I had MS but now things are getting even worse. Would light therapy work for me? My doctor has me taking vitamin D so would light therapy give me even more vitamin D? I am getting depressed just thinking about it getting dark early.
The issue you seem to be describing is consistent with seasonal affective disorder which is aggravated by the shortening of light duration this time of year, and less so about multiple sclerosis or vitamin D. It's possible that a SAD light box may be helpful. I'd suggest reading here http://www.mayoclinic.org/diseases-conditions/seasonal-affective-disorder/in-depth/seasonal-affective-disorder-treatment/art-20048298?pg=1
A. Scott Nielsen MD MMSc
Neurologist and MS Specialist at Kaiser Permanente