My boss is upset because I reported an incident to HR

It ended with an employee being let go for bullying and from there it went down hill. Last week he inappropriately side chatted me regarding an issue where I was not at fault and was presented with a fake document. It is apparent I have to return back to HR so they can address it. This bothers this team because they basically acting like high school students and they are not used to someone coming in and standing up for themselves plus going to HR if needed. They hire a lot of contractors just for that reason so they don’t get held liable for things. At any rate, last week the last straw when my supe put in team chat first thing that I need to be careful what I say publicly in chat, as well as sending me a percentage based on statistics that do not apply to me. I was forced into a meeting and he produced a document that was in no way related to me as if it were doctored. You know how in team chat your name is usually on the chat, well it was not so I asked him where is my name on this chat and where did this come from because it does not even have the same font as a team chat. He said it was just forwarded to me? Why would he not investigate before approaching me with something that even you cannot find in the chat. He apologized, but I am upset because I feel like they are fishing. Why would someone produce a false document and say that I said something that I didn’t and then retract. That is creating a toxic day for me and not to mention this has been going on for a minute. On top of this, I have a documented disability with HR and at this point I feel like I’ve gone to HR too many times but I don’t feel as it is my fault that I have to go to HR because these people are technically breaking the law, especially since I am disabled. I see people say hire a lawyer, but I also know how much that cost. I guess my fear is more retaliation trying to get me fired. This is technically illegal especially if someone has a documented mental health disability and this is affecting my mental health but I work from home and I get a good salary. I just don’t know how much more I can take. This last incident, the HR lady did not answer even though the last few she has responded to and took action but obviously they are going to continue acting certain ways and creating a toxic environment. I’m just done because I also have personal issues where I lost my kids Tragically. The next two years are going to be tough for me because I have a financial obligation that I’m trying to get rid of so this is ideal for me financially but mentally I want to take leave but I don’t think that’s going to resolve the issue.