Is this normal?

Me and my partner are trying for a baby, we have sex at night time as that is the only chance we get but I have noticed that in the morning my vagina smells quite bad🥴 I think it’s quite a strong smell but it goes away as soon as I shower and is never there at any other time.. I’ve only noticed it since he has been cumming in me. Is this normal or could I have some sort of infection?