Irregular discharge! Is something wrong or am I paranoid?

So I get this frequent discharge that's always thick and musky... Sometimes white, sometimes with blood and sometimes just brown all together. It's totally disgusting and makes me feel so insecure to even let my boyfriend go anywhere down south. I've been to the doctor three times and they've said there's no infection and because everything looks ok, they can't prescribe anything. But the discharge continues literally everyday. I'm ashamed and lost on what to do😪!!!