All that stuff you've been reading is doing is suggesting some possible manifestations of Chiron conjunct Nessus. Not every possible manifestation is going to manifest for you.
If you are in fact a rape survivor, that's one piece you might look to so as to make sense of that experience. If you are not, that interpretation doesn't apply.
Other possibilities include personal insecurities around sex/sexuality, or something about your sexuality being unusual and looked down upon (for example, being gay in a community where that isn't accepted; being asexual when everyone's expected to be sexual; being oriented to a fetish or kink), significant issues with inheritance or shared resources, family secrets or societal taboos causing you significant trouble, things like that. Trauma, of any kind, is also a possibility. It doesn't necessarily have to be sexual trauma.
You know what you've experienced in your life so far. We don't. Do any of the above examples sound true to you?