Ammonia SMELL after Sex

Let me start off by saying I am a very clean person..

I have noticed my vagina has no smells on a regular basis. But if I have sex and my husband Ejaculates in me then I notice the next morning how STRONG of an Ammonia smells I have coming from my vagina!! I don’t understand it. I don’t have any symptoms of an infection and his sperm doesn’t smell either. But once he leaves it in me until the next day this Strong Ammonia smell surfaces!