Discharge ?

My discharge come out a watery white substance and it’s a lot and this never had happen to me before and it’s so much last night when I got up to go to the bathroom when I stood up and looked in the mirror it just leaked out through my underwear and was going down my leg . I have been using monistat for a yeast infection I think I had because it wasn’t burning it was just itchy and had the watery white discharge .. should I be worried ??