I agree with the idea that you need to weigh the pros and cons and decide for yourself. At the same time, I would be very concerned if I were still in a psychosis. If I were unwell, I would not be able to tolerate the stimuli of traveling. Yet, that is me, not you.

I would also be concerned about my son. On the one hand you say your H will be with him. On the other hand you write that you do not trust H. If this is true, it only makes sense for you to be present for the appointment. (?)

Sometimes, a change of scenery can be very helpful. Other times, it might exacerbate the psychosis. You have concerns about not being safe when you write about sharp objects being available on the trip.

All things considered, I would lean toward staying home for now. I would hope to get increasingly better and go on a trip another time.

I realize this is a tough decision for you. I hope you will weigh this out for yourself, as you know much more about yourself and your family's situation.