Ineffectiveness of divorce based on a false reason

Q: I married a woman and we loved each other and remained on good terms for six years. One day, she annoyed me and I became so angry that I divorced her in her menses. I then revoked the divorce after which we remained on better terms for three years. I then traveled to the Kingdom where she sent me a letter including many insults and obscene words. I got so furious that I sent her a document of divorce. (Part No. 20; Page No. 52) One month later, I sent a document of a third pronunciation of divorce. When I came back home, I came to know that it was not her who had sent the letter; rather, it was someone else who confessed his sin. I was driven mad that I was fully unaware. I cried till my tears flowed down my beard and I became like Mughith or even worse, for, in fact, Al-Mughith was not cried for by Barirah. Actually, my wife and I cry for leaving each other as she is also the mother of my child. On knowing about it, scholars asked me to tell them the whole story which I did. One scholar said that he thinks the first pronunciation of divorce was ineffective taking place during menstruation. Another scholar said that divorce was based on a cause which has the effect of rendering divorce ineffective since the effective cause is not existent. He also said that uttering such a cause verbally is not necessary as viewed by Al-Hafizh Ibn Al-Qayyim (may Allah be merciful to him) in his book I`lamul-Muwaqqi`in where he stated: If divorce is based on a cause which turned out to be non-existent, Ahmad views that divorce will not be effective. According to our Sheikh, it is not necessary to utter such a cause verbally and thus it makes no difference whether the cause is uttered verbally or otherwise. Thus, if it turns out that the cause is non-existent, divorce will be ineffective. In fact, this is the only opinion befitting Ahmad's school of jurisprudence and the ultimate inference of scholars' rules. (I`lamul-Muwaqqi`in, p.91, vol. 3)Moreover, Al-Hafizh Muhammad Jundalwy, a Hadith memorizer, (Part No. 20; Page No. 53) scholar and Muhaddith who has studied Sahih Al-Bukhari for seventy years and taught at the university, perhaps you know him, and is an in-law of the great scholar Ihsan Ilahy Zhahir, said something valuable: The third pronunciation of divorce is ineffective as it was sent after the second between which no Ruj`ah (revoking the divorce) took place. This is also the opinion of Shayk Al-Islam Imam Ibn Taymiyyah (may Allah be merciful to him).