Posted: 21/09/2017 at 09:05
If you used the recommended amount of fertiliser that shouldn't add to the problem. Where problems occur is when people use too much fertiliser on the basis of if x per square yard is good, twice x must be even better. Using too much fertiliser can actually damage growth, although it will eventually recover.
As has been suggested, seeding now is the best way to address the problem and see what happens ove winter.