hiii I admire you for positive outlook. Chronic fatigue syndrome require treatment. because it ultimately affect your psychological health which can lead to erection problems. Tryptomer is good drug for both CFS and headache i prefer 25 to 50 mg in my patient. alternate to that SSRI is also useful. after proper control of it we can think about erection problem. erectile problem has many origines 1st is life style stress and busy life style make u fatigue and secondry to this it makes less desire in sex and erectile problems 2nd is relationship free communicative and mutual understanding will help sex is mutual act so try to do mutually and tell your problem to partner this will reduce your anxiety and able to erect easily so stress free lifestyle and mutual communication will help third is physical health routine check up and fit physical health is necessary psychological soundness is must and sun set focus method for erection is very useful . plz read google ab this medicines like sildenafil,, tadanafil, tetrafol plus etc do take advise from doctors get well soon thank you take care