Worried sick about online troll

Hi everyone,

I am so stressed out and miserable and worried and I'm looking for some help.

I'm an autistic woman in my thirties and going through a lot at the moment, with some serious health issues and depression and anxiety. I've been staying at home a lot over the past two years and spent a lot of time on internet forums, one specific one especially on learning to code, as I hope to be able to do this and change my career.

One particular poster started harassing me because I posted something he didn't agree with once. He would follow me from sub forum to sub forum, replying to my posts and comments with nasty replies and mocking me. I had posted something quite personal, describing something bad that happened to me (victim of a crime) and he called me an idiot and told me it was my own fault and mocked me. I then snapped and sent him a PM, and I'm ashamed to say I called him the C word. He then replied and told me not to DM him, and I replied to the DM saying he was a horrible person. He told me if I sent another DM, he would report me to the police for harassment. I then blocked him, and then woke up the next day to find I was banned from that website because he had reported me for harassment. I tried to appeal and make the case that he had been harassing ME but no luck...turns out he'd a mod on the site and basically he set me up.

I am absolutely terrified now. I keep thinking surely sending a single message on an anonymous forum calling someone who has been harassing you the C word is not grounds to be arrested? If that were the case surely the police would never get anything done? It was literally two DMs in the space of 10 minutes, nothing else, and I did not contact him again once he mentioned the police. I imagine that me blocking him triggered him to get me banned from the site as a punishment for no longer responding to his goading and bullying, but what if he has in fact reported me to the police as well? I keep telling myself they would never take him seriously because he was obviously goading me, and I would think following someone around different sub forums to insult them and goad them is far more harassment than sending a single DM telling someone to F off, but perhaps they wouldn't see it that way? Presumably he's deleted all his harassment of me and I'm no longer able to delete anything now my account has been blocked.

I am so worried about losing my job...I can barely sleep and I'm constantly anxious. I feel so stupid that I responded to his goading and it didn't occur to me in a million years that calling an anonymous poster on an anonymous website the C word once would be grounds for any kind of police action. It's not targeted, it's not sustained, I have no idea who the guy is, it doesn't seem to meet any of the criteria for harassment, and I don't think sending DMs when someone has their DMs open is harassment (and as I said, I sent nothing else once he mentioned the police) but this guy seems totally unhinged.