So As I Slept Last Night, I Woke Up Briefly

So as I slept last night, I woke up briefly at at approximately 4am to turn the other way but I suddenly felt a gush of liquid, for a moment I thought it was my period. Hurried to the toilet only to check that the liquid was clear and watery with no odor whatsoever. What could this be. ? Should I be worried? Is it something that can reoccur?