I think its worth the risk, even if the t rejects you. Because this is stuff you need - whatever it is it is your stuff, and its important to know if the t can work with you on it or not. If t can't it is better to know now than 3 years in. You need someone who can work with you on your stuff, wherever you are in your journey. If a t can't do that there is little they can do to help you.
And you probably need a trauma t... someone who is experienced and knowledgeable about trauma and dissociation. If you have a history of those things you need someone who knows their stuff. Your stuff. Someone who can help and guide you through it.

I have been to see a couple of ts in the last few years as I have some important t&d stuff I still need to work out. I asked them prior to beginning t with them about their knowledge and experience andboth ts said they knew a little and were wiling to learn. But it wasn't enough. I needed someone who knows their ^$4# about this stuff and can jump into the hard stuff straight away. Neither of them could do that with me, so once I realized that I didn't bother returning. No point.
My current t gave me a referral to a trauma t just a few days ago. I will be talking about t&d with her up front and will not waste my time with her if she isn't where I need her to be. I aint got no time to pussyfoot around.

So yeah, Jump into the hard stuff. If she cant do it that is good information for you. Trust me. You need someone who can walk the road with you.