Yes, if you don't see at least blue tonight, I would increase tomorrow. But if on the wild chance it's your pen gone off, I'd try a new pen on a different cycle than an increase. You can always try a new pen tonight and if you don't see drastic changes, go back to the old pen to use it up. But it looks like it was less than a month ago you started a new vial? Kept in the fridge, it should last longer than that.