Sorry pompa you are likely right about drugs maybe not being the cause, to be honest it is probably day time television that is making you down! Hope you soon get back to your normal self,
How will things change if our summers keep getting hotter
“We start school too early in the UK!”

and
for you.
to brighten your day and say I'm thinking of you and hope you feel a little brighter today
but these may well be contributory factors.