Hi Kat, it is not really necessary for anyone to use mouth wash, it really only freshens, your breath. If you do use mouth wash make sure it is alcohol free as the alcohol can irritate the soft tissues in your mouth and further aggravate your gums. Really recommend flossing daily and brushing at least twice a day. And it is a fallacy that teeth are effected by pregnancy it is actually your gums that suffer during this time!! I've got 22 weeks til EDD! Other than teeth i hope you are feeling well!! )