Betrayal

Not sure how to handle this...I work at a group home for adults..one of the residents self harms actively... She figured out I have self harmed..she asked about visible scars and I didn't deny it. A few times she has used this against me with the people in charge...but seee. The guy who owns the company knew before he hired me..because he asked when he interviewed me. But that is none of her business. So I explained that as needed to the program director when she asked me about it. No I didn't lose me job..now I'm being told this dang resident is telling other staff that I used to be a cutter..and that makes me really upset and hurt...its not her place to say any damn thing about me to anyone and she keeps doing it..I don't know what to do about it. And I'm so pissed off.any way I look at handling it leads to me getting fired...but this is just wrong. I don't know why she is doing this..I have worked off and on at this place for a year..why now? Why tell now?? Because I don't fall for her bs any more? I don't know... I can't seem to let this go...I can't help thinking that all the staff now think I'm awful and just like her..or now wonder why I know so much..or why I even work there... I feel like I'm being talked about..and I've done nothing...I don't feel anyone will come to me and ask...and so it will just be gossiping.. And I really hate that. I can't handle that or those thoughts