Having smelly odors wat should i do?

i keep on having this nasty odor. it smells like fish and i have alot of discharge but the discharge is a normal color..and my husband is so turned off from this odor. i tried douching and even right after i do it, it still smells durin sex. everytime i go to the doctor and get tested my test are always negative. no STD's or infections...and this odor comes and goes..does any of u females have the same problem??? i just think its so nasty for me to smell this way. i take like 2-3 showers a day..i know our vagi isnt gonna always smell like flowers but idk wat else to do