Have any tips for letting your guard down

I was watching a video and the guy is talking about OCD in general. He says you are supposed to say “I guess it will happen” when you have an OCD fear or intrusive thought. But my thing is if my brain is telling me I have to be on guard or else I will be a danger to children I’m just not sure how I can say “I guess it will happen”. Does anybody have any thoughts on this?

A little over a year ago I ended a 10-year relationship. I found out that he had been lying the whole time and was an alcoholic and avid drug user. Since then, I unexpectedly met and started dating a great guy, but my relationship OCD and trust issues are going to ruin it. He’s given me no reason not to trust him and has reassured me plenty of times that I didn’t deserve what I went through and that it had nothing to do with me. So why do I continue to make snide remarks about his “other girlfriends” and what not… He’s also divorced and has his own problems to work through, so I feel bad adding more to his plate. I know that I’m imagining the worst case scenarios in my head to try and “prepare” myself for things that could happen, but I’m going to lose him because I can’t get out of my head. I’m so afraid of missing something like I did with my ex that I pick everything apart. Every story detail, every inconsistency, heck I even convinced myself he was cheating because he deep cleaned his house on his day off… Advice on starting a new relationship without carrying over the trauma of your old one?

does anyone have any tips to help with hyper vigilance in a relationship? In my past relationship I got cheated on and it hurt me mentally, and now with my current partner I always have a constant fear that something bad is going to happen even though I trust him a bunch. Like if he brings up another girl and says oh she said this. And I get so triggered by it, how do I stop. Like I trust him 100% but my mind isn’t letting me, and I feel like I always start this and do this to myself. Or if it’s a girl from his past relationship and something gets brought up about it because of me, and he’s tells me it still makes me mad.