Does Medicaid allow you to be on a waiting list while you continue to see this lady?

If she's not doing a good job, you can always stop talking about those things with her and wait until you find someone new. Like, find different things to talk about. I know that's not ideal, but if she's making you feel worse, then it's better to wait for someone new than to continually get triggered without anything to fall back on. That's not good for your mental health at all, and no one should subject themselves to that torture. I'm sure the lady doesn't mean to do that, but still...

If you're still going to talk to her about the EMDR stuff, you should at least tell her that you're triggered and have nothing to fall back on. It's best that she knows what she's doing wrong so that she can learn from her mistakes, because some people don't even realize what they're doing wrong unless they're told so.