Not sure if this is the right place for it, but it feels like a stupid question

Basically, I have a big fear of police and security workers. I was arrested under very difficult circumstances a few years ago while mentally unwell, and have since been mistreated by security officers, picked up and dragged and pinned down, while in hospital and mental health units. This has led to a fear of anything to do with security, I needed to go through a body scanner last year and it took me half an hour. I'm autistic and just went into a shutdown, not able to move or speak. In the past I also had what I can only akin to a PTSD episode when I had to put my bags through an x-ray scanner, my brain just thinking I was going to be arrested at any moment

The problem is that I have a flight booked for Thursday, and I've been thinking I would be fine, but in the last couple of days my anxiety has shot up and I know it's around the security. I also haven't been abroad on my own before and haven't flown since 2014 on a school trip, so anxiety is generally high

I'm not really sure what I'm looking for, but maybe if anyone has any tips to help me get through? I've requested airport assistance and will be informing them of all of this, but if anyone has been through similar it would really help to have some more coping strategies as I know how bad I can get with this

Thanks for reading and for any advice you can give