I can relate to so much that has been written here.
I have experienced two personality changes in my life. The first happened gradually between the ages of 14 and 18 when my family was converted and I was forced to change from a normal, confident, outgoing girl with the intention of going to uni and getting a good career, to an anxious, subservient wimp with no prospects other than to knock doors and take my place at the lower end of the pecking order in the congregation, along with all the other single sisters until we married and could then look forward to 'supporting' our husbands like good little JW wives should do.
I lived for so long with a 'masked' personality that by the time we left I had a breakdown as I did not know how to be myself.
That was over 20 years ago and I am still working on getting my real personality back and trying to be more confident and assertive.