Putting Evergreen complete on a month old lawn

Hi all I'm in big help. I've used evergreen complete 4-1 on my month old lawn as I was getting few mushrooms and weeds coming through thinking I will nip it in the bud before it gets to bad. So I went and bought some evergreen having 110m2 garden I though the tub would do and it did. After scattering it all over as instructed I sat down thinking I've done a good job only to look at the precautions and seeing "do not use on new lawns" and "it should be no less than 6 months old". Now I'm wondering what I can do to prevent losing my newly laid lawn if anything or fingers crossed it will survive the weekend. Please please help!! Thanks Steve