I think early in relationships it is best to handle triggers on my own, and then when the intensity of the trigger has passed to get really clear on what I want and need and to communicate what I need it without getting mad.
I'm sorry you got triggered, but it sounds like he did not do anything wrong by skipping one day of texting. He is not responsible for your triggers. He is not obligated to take care of you. He is a free man. You end up sounding over controlling in this instance and I don't think this is what you really want in your new relationship or who you really are.
I wonder if these triggers are a signal that you are a little too emeshed with this man and its making you uncomfortable. How many weeks or months have you been dating? I think it is not very long.
Texting several times a day every day creates a false intimacy where you might think you are close because you text a lot. You only really get close to people by relating over time and observing each other handle stress and joys in the ups and downs of real life.
The PTSD effects of betrayal are real. It is painful that we had these experiences. On one hand we are victims because something bad did happen to us. But we can't heal and stay in the victim place. We have to find a way to expand out of that limited role, take responsibility for how we handle triggers without blaming the people around us.
You are an amazing and strong woman. You are so kind and caring to your patients. I hope you find a way to approach this situation from a greater perspective.