Hi welcome to PC!
some one will come along to answer your question. I don't have an answer for you.
It is good that you see the differences. Do you take meds?
Do you have a therapist?
they can help you figure out you emotions and moods. perhaps do time line?
If you have seasonal disturbances others have used a light box to combat a low mood.
I hope you have a nice day.
And seek medical attention for those head aches!...you are suffering!
bizi