I don't really have any sage advice for you to fix this, but I went through the same thing with my bf, for like the first year of our relationship.
Its like being on high alert for any little sign that could mean history is repeating itself.
Everytime it happened to me, I would try to take a step back, breath and put it on a timer.
If X still bugged me in Y amount of days, then I deemed it worthy of a discussion and not a state of unwarranted panic.
I think the biggest favor I did myself and our relationship was taking a leap of faith.
Trusting that he really was different, not just on the obvious outside, but inside as well, and that he had no ulterior motives and would not turn on me, or turn out to be using me.
Everytime I started to panic, I tried to calmly remind myself that I had chosen to take a leap of faith, and that I refused to actually follow through with the panic unless there was a reason flickering in big bright neon lights.
I'm happy to report that I did not fall down a canyon!
I'm glad you're posting instead of stewing and worrying, I hope you two have a great weekend together.