I used to take Beconase daily until my GP changed me to one they decided was better (i.e. probably cheaper, but I find it better as it happens) and whilst it's also a steroid spray, I'm not aware that it has had any impact on BG or any other steroid based complications, as it's a very small dose. The only thing I'm aware of is that I feel better nasally when I use it than when I don't. You need to use them faithfully for a little while to get full benefit, they don't give immediate relief.
My condition is slightly different in that I have a hiatus hernia and consequently inhale acid from my stomach which irritates my sinuses.