I know this is very petty and nothing in the grand scheme of things but I really would like some opinions on what is going on here....
So basically I have a couple of friends who I am stealth with on an online community, and for some reason I think they know about my background. I have no idea how, we do not interact outside of the website in question and they have no way of knowing who I am outside of what I've told them, no pictures, no voice, no real names, no emails, nothing.
I can't tell if I'm just being paranoid or if somehow they've investigated, I really would like to figure this out so I can take appropriate action. If they have in fact managed to discover who I am outside of the website then something has gone wrong and I need to rectify it, I do not want these people in my actual "real life"
There is one woman in particular who always says "hello ladies" or "goodbye ladies" when talking to a group of us, when I'm included in said group. At first I just playfully said "hey we're not all ladies here

" thinking it was an over site on her part...but now she definitely seems to be making a point of calling me a girl and including me in her "ladies" comments. I've been ignoring it lately, wondering if she was only doing it to annoy me, but despite the ignoring, she still does it; and I'm confused.
Then today I received a message from a different person in the group asking me for some graphics stuff making, she used the phrase:
I was told you were the "guy" to ask.
The "guy"?
I cannot think of any possible reason to put "guy" in quote marks other than it being a sly wink to the fact she knows I'm "not really a guy" and I'm not sure how to proceed.
Any opinions would be greatly appreciated...even if they're just to tell me I'm being stupid