watery discharge

okay so this has literally never happened to me and i don’t know what it could be. this morning i literally thought i peed myself so i got up and there was watery clear/milky discharge running down my legs?? i’m ovulating today but i’ve never had this before. i haven’t had sex in 5 months and i’ve been tested since then (all negative) so what is it? there’s no odor or itching it’s just really watery :/