Have you by any chance worked with MAP? (I've never come to this forum, but glad to have seen your post today.
Here is a link to a word about the book...MAP has been really helpful to me in the past, when working with some major expansion experiences or 'spiritual emergencies'.
My belief is that such cysts are the physical 'signs' of being pregnant with something that could be life-changing. Being prepared to happily meet this new level of being with trust feels certain to transform your experience into one of more and more light. Wishing and sending you All Good, and all embrace.