Does zina in iddah spoils iddah?

I am performing iddah after getting divorce from my husband, still one month is left to complete. Due to some urgent problem I needed a man's help and to solve my issue he demanded me to do zina. I did zina with him unwillingly. I know its a sin and I continuously ask for forgiveness, but please tell me does it make any difference to iddah? Did it spoil my iddah?