I took my wedding ring off to clean it
Why did it need cleaned that badly?
I had sex with my girlfriend on it.
Putting your ring inside of your girlfriend's vagina is a very dangerous thing you have done. She could have a tetanus infection or your ring could have been stuck in there and would need medical procedure to be taken out. You should practice safe sex with your girlfriend moving forward.
I don't care about her and I think she's going to infect me anyway.
I think that that does not matter. You need to be more careful with your ring next time. It is dangerous to use a foreign object like that anywhere near a vagina.