I understand that my fears are based on mistrust.
Whenever I read that, I feel that you are blaming yourself for this. As if the mistrust was something you are doing wrong. Is it that way?
I feel totally unheard. Hubby acts like I am looking for trouble or a fight. Therapy has run out too. No more ££ :(
Many years into my marriage I started getting seriously suspicious. I think some might have called it paranoid. He kept telling me he was not seeing anyone, wasn't interested in a certain woman, had not beamed at her while I was standing there with them, etc. He was working late sometimes, sometimes not. Something had changed and I couldn't put my finger on it. I still wanted to make the whole thing work and he always sounded genuine. But he wasn't. He had started an affair earlier-on and had, he later acknowledged, created two different worlds, quote, "one for the fun and with you as my family".
See, the problem is what you're scared about is a realistic scenario. People can have affairs and children can get abused. And although I do not want to increase your fear, I think it's important you address this and give it space and attention, if those around you do not. Maybe you can pinpoint what exactly it is that causes that switch to click?
A former GP, now friend, said to me a long time ago: Make yourself aware what you put your energy into and whether you have done the exact same thing in the past. If so, has it had any use? If not, think about whether you would like to put that energy into something else.
I came to think about this just now when I read about your fear about your children when they're away from you. You can't do anything when you're not with them, but maybe you can do something with them when they're there that will help you feel safer about who they are, how strong they are, what they can and can not do, give them a strong back-up and a place to come to if ever they need it?
What I have always perceived as the worst part of my traumas (and what I don't think I'll ever get over) was that I always reached out for help and never got any. Meaning, there were people and I approached them, and they did nothing. They were not able to prevent me from e.g. getting abused sexually, but they could have acted upon my reaching out. So, in my view, you are not helpless, but you can do something to make/keep your relationship with your children strong so that they know where to run to if and when they need your help.