Uhm Weird?...

so yesterday my husband and I had sex well a few hours later he randomly looks at me and says your pussy smells like your pregnant (which is weird bc as far as we know I'm not)... uhm the heck? i was like what do you smell a difference or something? do i stink or something? and he was like no nothing like that you just smell different like idk sweeter? uhm so my question is can guys smell if a woman is pregnant? like he claims its bc men can smell women's pheromones so is that true? idk it kinda has me excited to see if my period will actually come this month or if hes right lol.