I hadn't SI for many many years and it came back soon after starting therapy. My T eventually found out that I was. We don't speak about it, although very occasionally I will be asked if I am, if it's got better or worse. I know how hard it is to share things - but I do thing it is worth highlighting as then your T may know to just go a little slower, or to explore ways of supporting you. So I don't think it is necessarily because therapy isn't working, but maybe because it is? It's touching the raw stuff. Take care.