TMI, is this discharge normal or an std?!

So I’ve been having this discharge for about 2 in a half months and it comes out in quantities like this . I’m not sure if it could be like bv or even an std , I’ve been having unprotected sex only with my bd and he got checked and he says it was negative for all stds but I’m not sure if he even got checked . So if y’all could just ease my mind a little that would be great or even let me know If it’s something i should be concerned about ?