I'm having something similar.
I have a friend into spirituality and meditation who had serious episodes of dissociation, she couldn't get out of her bed very often and her parents were thinking about taking her to the hospital some days.
Right now i have frequent episodes of dissociation (most of the time they are mild) with your same symptoms.
I am not scared at all because, i know what is waiting for me, because i've seen my friend's same situation coming and passing away. Probably i am also calm because i talked a lot about this with her.
I'm solving this with a total surrender to dissociation episodes, let them come into and then go with complete acceptance and tranquility. You can also try to contemplate this state of mind, it can be really interesting and unique.
I also think that when you are into spirituality and dissociation comes, then it will never let you go, you will not do everyday things and pleasures with the same state of mind, for me it is something that i must accept, right now and for the rest of my life.