Thought of the Day - Energy Levels

The last couple of days my energy levels have been really low, i'm not sure why. I'm eating the same things i have been for the last 6 months, i haven't been doing anything particularly different compared to the last 6 months so what has changed?

First possibility is that it has been dark when i have woken up due to the rain and the lack of sunlight is affecting me. Though it has been dark and rainy in the past without this effect.

Second possibility is just that i've been feeling a bit down recently. Though am i feeling down because i'm tired and have no energy, or am i tired and have no energy because i am down?

Who knows, hopefully i will feel a bit more energetic in the next couple of days or i will have to look into some further changes.