I never had psychotherapy. As a child I had hypnotherapy and it seems to have helped with an issue I had at the time.
Interestingly I have not noticed the switch to British English :) I originally learned British English, but since I have been in America for 28 years American English is more natural for me.
Glad it helped.
Most in Finland learn Br English too, but because everything comes from the US, they often speak with an American accent. I am sure that for some time, I am going to write a mix of spellings :)