Discharge and odor

Ever since I started having sex without condoms almost a year ago, I've been experiencing a lot of discharge and it smells like pee. It's consistent, except for when I'm on my period. I've been to my ogbyn about this at least three times and she says its normal to just wear panty liners. I have no stds or any type of abnormalties. I am not in pain. I'm not pregnant. It's more annoying then anything else. And it makes me self concious. Is anyone else experiencing g this?