Does divorce take effect with the word "mashi" (okay/alright) if one intended divorce while uttering it, knowing that the conversation was not related to divorce and that the questioner suffers from obsessive-compulsive disorder concerning divorce?

Words that do not carry the meaning of divorce do not constitute a divorce, even if the husband intended it, because the wording itself does not lend itself to divorce. Divorce issued due to waswasa (obsessive whispering/doubts) is not valid. If you doubt whether you uttered it voluntarily or due to waswasa, then no divorce occurs with this doubt, because the original state is the continuation of the marriage, and it is not removed by doubt.