Does a divorce take place if the husband says to his wife, "O Allah," in response to her saying, "O Allah, let's stop," in protest from her, and is this considered an answer to her request, and is it considered a divorce?

This phrase is not an explicit declaration of divorce, so it does not constitute a divorce without the intention [to divorce]. Doubt regarding the intention to divorce is not considered, because the original state is the continuation of the marriage. Therefore, we advise you not to pay attention to these whispers [of doubt] and to completely disregard them in their entirety.