Sperm makes your vagina smell!

Hi ladies so I finally came to the conclusion that sperm is what gives us that fishy smell in our Vagain. Me and my husband are very sexually active and always cums in me and I deal with that smell all the time, and I do everything to makes sure I keep it clean and I used Eveythings and the pass 1 week we have not being having sex due to working and family and the smell has gone away and last night we had sex And he came in me and we went to bed and this afternoon I woke up to used to restroom and I smelt that fishy smell again so I told him and he doesn't believe me anyone experience this! Help me!!!