It's me again :P

I'm quite mad at the the moment. After telling my mum in confidence she has now told my boss, uncle and my grandmother who loves to gossip.
To top it all up though she has been in contact with HR and our union. According to her they said he can possibly face disciplinary action, since he was aware of my mental health problems and use to be my boss they might see it as an abuse of position and taking advantage.
What's made me the most angry though is not that she seems to be slowly telling everyone (I'm angry about this aswel don't get me wrong), it's that when she told me about contacting HR she didn't even ask if I wanted to take any action just said that we were going to put a complaint in.
She was quite taken back when I said I don't want to report him. I said that I don't see the point that he'll just deny his intentions and they can't proove it. All it'll achieve is making me more stressed, and possibly making him angry/angrier.
At the end of the day although he's hurt me by doing what he did (although I doubt he realises this). I don't want to go out of my way to hurt him back it wont make me feel any better if I ruin his career. It will also make it more likely that this will become public knowledge if I report this.
She doesn't seem to get that I just want to leave it and let it pass. Don't get me wrong I do realize that she is trying to help me, it's just in the wrong way. I don't want revenge I just want to know that she's there to support me in the situation if things do become out of hand. I don't want to be the instigator in making the situation worse.