I empathise so much.
The endometriosis diet lifts fatigue. You could also try a good quality Q10 supplement. Pharma Nord BioQuinone Gold Q10 (100mg) has an outstanding reputation among doctors and customers, but you'll need to check it's soy free. Avoid the stronger form: ubiquinol; anecdotal evidence is mounting that it's causing worsening fatigue in some customers.
Kimberly Snyder's Glowing Green Smoothie recipe is an energiser, too. I drink this 5 x per week using strictly organic produce.
Please show yourself lots of compassion. Endometriosis is a horrible disease with fatigue and pain so debilitating that it can turn women into shadows of themselves.
There is light at the end of the tunnel. I had to overhaul my lifestyle and get into a 'clean' diet to get there: no sugar, dairy, gluten/wheat, alcohol, etc. Try endo-resolved.com - there'S some diet advice on there. Good luck. x