My article was on the 5th place, I decided to change article name because it was not to specific. So now I have different permalink and I made 301 redirect from old to new one. This happened few days ago. The problem is that I can't find my article on google anymore, there are just link with tag on 7th place. Also I expand my article and I include my focus keyword on more places so now I have word density 1.9%. This is not the first time that I make some changes but I never changed link or article name and I never had situation where I can't find my article on google. Is this ok, should I be worried?