What does it mean when my urine is dark and smells fishy and i have mixed signs between a uti and yeast infection?

Possible gardnerella: There is a very common vaginal infection called gardnerella vaginitis which classically has a fishy smell. You should be evaluated and have an exam done by a doctor as soon as possible. Treatment is simple and very effective

Many things: You could also be suffering from a bacterial infection of your vagina that needs antibiotics. It would be prudent to have a physical exam so you can be properly diagnosed.