Hi,
Please be kind to yourself.
I light candles in the winter because, even in No. Cal., I get a little blue because the days are short and I can't be outside as much (I love to be outside).
I make myself a cup of tea, light the candles and....it helps.
I am 51 and have noticed every year I gain about 5 lbs. in the winter, and then, it seems to go away in the spring. This is a pattern that seems to be true for me since I was in college. There are rhythms to the seasons.
Staying active will help you mentally feel good about yourself, too.
Oh, and make sure you are balancing some protein with each of your meals.