Not sure if this applies to you, but I know that the CC heavily stresses diagramming just to teach it, but you definitely shouldn't be diagramming the majority of LR questions. That could possibly be a source of slowing you down?
... the questions. When I slowed down my reading pace a bit ... myself enough time," try slowing your pace down just a bit. Be ... acknowledge that you're slowing your pace down with the intent to ...