Text crisis lines? Online support groups?

I've just recently started to deal with the trauma that happened to me almost 10 years ago. I have a great counselor at my local center, and I see her every 10-15 days. However, lately I've been having some major issues between sessions. A couple of times now, I've felt like I was in a state of crisis during moments where I'm unable (or sometimes too anxious) to make a phone call. I look calm on the outside, but inside I'm a total wreck. I can't focus on anything, I get a splitting headache, and I'm so nauseous I can barely look at food. I know I need more support, but I don't really know HOW to find the RIGHT support for me. I know about the online crisis line from RAINN, but I feel like that's more specifically for SA and rape, whereas I was abused as well as raped. I kind of feel like I'd be an imposter, even though I realize that's not rational.

Does anyone have an online support group or crisis text line they'd recommend for someone like me?