You might not be able to think of any massive trigger, but maybe it is an accumulation of much smaller stressors which is making you feel like this. You have said before about being quite hypersensitive, and it isn’t that long since you have moved (iirc, just a couple of months?) so maybe you are still adapting to things are different in your environment in minor ways and that is using tiny extra bits of emotional capacity to adapt to, making you anxious and more prone to anger because when you are anxious that can trigger you into the fight or flight state. I am speaking from my autistic experience, though I think this can apply to anyone with hypersensitivity, but really little sensory things can build up when you have to get used to them (slightly different lighting, different textures or smells, etc) and stuff like tiny changes in positioning of things and how you interact with a space, it all uses up mental resources and you don’t always clock that these things are having an effect on you.
Sorry if I am completely wrong here and none of this applies or if I have accidentally sounded patronising. I am doing very badly managing anger at the moment to, keep end up shouting at people and I feel terrible about it