Anal discharge

Okay if anyone can tell me anything it would be appreciated so this has been happening for about 6months and it doesn’t happen when a partner fingers me but when I finger myself I get a gel(clear mostly no blood ) like consistency to come out my ass and I know I don’t have an std because I just got tested last month to make sure it wasn’t that but when I read online they talk about scary things so I was just wondering if anyone had some insight