Hi Larisa,
I understand how you feel as I know how much it hurts inside to be addressed by the wrong pronoun.
For myself it happens very rarely now and is genuinely a slip of the tongue when said by friends or colleagues. They are really sorry for their mistake.
I have first hand experience from their side when a colleague said that her real name was Sayran - not Sarah as we all know her and that she prefers to be addressed as Sayran.
It takes time for the brain, I think,to take in + fuly process + reprogram itself to new ,and sometimes , difficult concepts.
I made a conscious decision to call my colleague Sayran but found myself slipping up from time to time. I don't slip up anymore - but it was a valuable lesson to me that when people have addressed me as other than Steph, or her,she etc..they feel bad about it.
Also,you tend to get an instinctual feeling when someone is being intentionally hurtful.
Be strong and be patient. You will be fine.
I hope this helps
Steph(Fairgirl)