Google has web crawlers that search the entire web, building indexes as it does that. No one has to copy anything. Google will find it, build a link to the original and then index it. When you search on anything Google will return only the link. No copies are necessary.
Anyone can read medhelp without an ID; you only need an ID when you post.
Obviously someone copied and pasted it, Not an uncommon thing!
Your journal and posts are available to google. Just don't put any personal information in your posts and it shouldn't be a problem. No one can find your identity.
I have seen MH threads come up on google when I researched various topics. Its a small internet, after all!
Welcome to MedHelp. Hope you are feeling better by now.
jd