Hello lonely
Emdr is a very traumatic experience in itself so it makes sense he is reluctant to proceed at this moment in time. I'm surprised he is not going to with you in a different way though. Is he only trained in Emdr? Or did I misinturpret what you mean by that he didn't offer further support.
A meeting sounds like a good idea to me. I know it's very scary to go to a meeting with all those professionals but they are having it to work out a way forward for you. Surely it's better to be involved in the process and hear what they are saying and be able to put your own points across.
I know I have said this a lot but a meeting like that would be an ideal situation to use writing things down to your advantage. Make some bullet points of how things are from your point of view so you don't forget in the anxiety of the moment. If you know what you would like out of the meeting ideally such as more of a specific type of support or to continue therapy or try a different therapy include that as well