How do i slow down my vaginal discharge?

I've been having very bad vaginal discharge for a couple of years now and i dont know what to do. Its a yellow mucus color and it is thick sometimes. Sometimes it even has an odor. i take baths everyday so i dont know what is wrong with me. Can someone please help me learn how to control my discharge or is there a surgery i can get to slow it down? I forgot to mention in my first post that ive been tested several times for std and my doctor cannot find anything wrong so and the ob gyn says it might be normal discharge but i know something is wrong.