Unable to change difficulty of game (it is locked)

I have been playing through DA: Inquisition at a leisurely pace, mostly on the hard difficulty as to not make it too easy for me.  However, there were two points I changed the difficulty.  The one I remember clearly was after the grand ball when I faced that really tough lady...  My potions were down to nothing and the saves I had were before going on that mission or the autosave, which put me right back to the fight with that lady, potionless and helpless.  Anyway, I changed the difficulty down to normal, or possibly even easy? to beat her.  

Once she was dead, I either kept it at normal, or if I changed it to easy, I changed it back to normal.  

No problems...  I was going through questing a few weeks later and noticed that I was having a really easy time of it, so I wanted to ramp up the difficulty again to hard, but the indicator seems locked.  It is set at normal and I cannot hit the green A (select) button to change the combat difficulty.  I can choose B (back), and Y (reset), which I thought reset might work, but that did not do much.  

I am wondering if it is tied into an achievement system or something that now I am stuck on Normal for the rest of the game?  I got too overpowered and now I am killing enemies like it is nothing.  I don't even think about Fade Rifts anymore, I just point and shoot til everything is dead.  

Is there any way to change the gameplay back to hard?  I can scroll through all the difficulties, but none of them are able to be selected.  I tried doing it out of combat, and then when that did not work, in combat.  Maybe I have to be at Skyhold to do it?  I will try there, but so far nothing has worked.  Imma go try Skyhold, and if that works I will update here...  If not, someone please help!