@A myRAteam Member, I have added you to my team.
I think fatigue and depression go hand in hand, so does RA and fatigue and depression.
Depression can cause changes in sleeping patterns, either not being able to sleep or sleeping more than usual.
From my experience RA and depression can both cause fatigue.
But of course sleeping all day doesn't help depression or RA, but getting enough sleep is important. Finding the right balance is very difficult.
I hope that this information is helpful.