Could your physical tiredness be psychological?Your are in a stressful situation and stress could cause physical symptoms including tiredness. I too don't have the energy I should have. I checked it out a few times but now I assume it is stress induced.

Best wishes

R 25 years
M 14 years
S11 & S13
Working on it alone since Oct 2014
M in trouble a lot earlier (~2 years)
Feb 2016. 1st R chat in a yr.
Next R chat Aug'17
Still together