Hello dear brother
In my opinion, numbers and codes in the holy books were never intended by God. Especially because the Quran was not given as a whole book, but it was being collected and who knows how many things were lost, added or changed. There are differences in multiple Qurans (not just huruf, but different words and meanings, different number of verses...). People were putting verses and surahs in any place they wanted. So how on earth then you could take number of some verse, surah, or number of times some word was mentioned as relevant?

Second thing, if that verse about Jesus brought you to Christianity, then you admit Quran is true. If it's true, then Jesus is not God or son of God. But if Quran is a false book, then how can you use it's code 19 to prove anything?
The way you are describing your conversion and finding the truth is the same for everyone in every other religion. All of them had an opened heart, looking for the truth, researching, enlightenment, signs, dreams etc. Even Christians who become muslims say that Jesus led them to islam. And everyone thinks they are rightly guided and special.
So basically, after all these years I don't rely on personal experiences.