therapy sucks. no two ways about it really. but I really encourage trying to build a communicative relationship with your therapist, if you haven't already. if it is too intense/fast for you, or you want to work on building skills to care for the hangover after therapy that should be an option to you. the therapeutic relationship is very important, also fine to find someone else if your T isnt right for you, if you have the option.
I've never done full blown EMDR but I've been using elements of it in therapy for 2 maybe 3 years now, my therapist is trained in it but it would be too much full hog for me at this point.. has really moved things along for me though, in the tiny doses I have. not that it's fun but I am doing much better than I was before. which is hard to keep perspective on because better ≠ feeling good, but my QOL is definitely better.
emdr is hard because it's pretty good at peeling back stuff, that's how it works in my case anyway. peeling back layers to reveal other, sometimes even more unpleasant layers to deal with... but having less layers to wade through is good in the end, it has a cumulative effect. chipping away at the trauma onion.
but yeah. trauma therapy hangover is not fun, and will also come with every modality you go for. any skills and resources to care for yourself during that time could be very useful in riding it out til next time.
Im not concerned that you have a bad T or anything like that but also good for everyone to remember that skilled / qualified T that you can't get along with isn't going to help, just like a very "nice" T with no experience or trauma informed training isn't going to do much either.