i was with a trans woman and cant forget it.

Western Buddha
By Western Buddha,
Hello, 

Two months ago I traveled abroad and met a girl from the tinder, looking like a female to all intents and purposes, but when I got there she told me she was an escort girl and she wanted money. 
I told her I was not going to escort girls and she just brought me by the hand until I finished. 
I suspected a little during the act that she would not let me touch her or take off her clothes, 
And she seemed to have a lot of hair extensions, I talked to her later and she confessed to me that she was transgender and was really hurt by Meza.I felt at Brown for a week, I told a few friends who of course laughed at me and it passed. 
The thing that suddenly a month later I started to remember it again and since then it's just stuck in my head, I came back to my country and I still think about it and very upset about it. 
I feel like I've been sexually abused, I've had a lot of difficulties in my life and I've had a lot of mental scars but I've never dealt with a problem like that. 
I'm 100% straight and that's why it bothers me so much. 
Since I was with her, I had already slept with some women, and yet this thought still comes up here and there. 
I do not really know what to do, I decided that first of all I'll post a posere here and maybe try to go back there and hurt her like she hurt me, I'm talking about hitting her even though my chances of finding her are pretty faint, I know it sounds childish but sometimes I think it's a great solution to close circle. 
i'm doing meditation for already 2 years withoutmissing even 1 day, im just changing the time here and there between 20-30 minutes. i do the do nothing technique, should i keep going?
Thank you,