Vagina smells different when I wake up

So why is it that throughout the day my vagina smells good and normal but when I go to sleep and wake up it has an odor...like not like a fishy odor but like a weird smell...could it be bc of sex? And I don’t douche btw and no I don’t have a yeast infection or any Sti...will a warm bath maybe help?? And some mornings when I wake up it still smells good but the odor only happens sometimes...(don’t be rude in the comments please...looking for support and advice) and yes I take showers and wash properly down there :)