I am glad to hear that you are recovering and any progress in the fight against addiction is good progress. On the subject of your fatigue it seems to me like you are on a fairly high dose of suboxone. I find that it does not take a high dose to work for me. Before I began using suboxone I was regulary taking 2 OC 80s a day for a long period of time. When I began my treatment the doctor put me on 2 8mg suboxone a day, while this definetly helped my recovery and limited any withdrawls I may have had it was def. too much. I found myself dosing and nodding off just the same as if I was using again. Needless to say i lowered the dose eventualy and it was better. I did have a relapse however and went right back to using 2 OC 80s a day, when I wnet back on suboxone this time I began my treatment with 4mg of suboxone a day and it worked wonders, no longer did I doze off and nod out, I simply felt fine and back to normal. I strongly believe that often times people are prescribed way too much. If you are worried that cutting your dose will not be effective than think of my situation, I am 6'5 and 225 pounRAB and averaged 160mg of oxycontin a day, from what I have heard one vicodin or percocet is equal to about 5mg of OC so if you do the math then I was taking the equivelant of about 32 percocet or vicodin a day and 4mg of suboxone was perfectly fine for me.
So in closing I suggest that maybe you decrease what your current dosage is and see what happens, of course I dont recomend doing this without consulting your doctor first. Good luck and keep us posted.