Strange gushing sensation?

Hey yall. So I woke up today around 5 am feeling like there was something in my crotch. Like a gas bubble or some kind of pressure. So I went to the bathroom. Ever since then I have had this constant sensation that I am leaking down there. It feels like that gushing sensation you get on your period when you just know you’ve leaked all over your pants. But everytime I feel down there or go to the bathroom my underwear are completely clean and dry. I can’t place what’s causing this sensation. I am 35 weeks and have not felt this until today. I tried googling it but not much came up for “gushing sensation in crotch without getting wet while pregnant “😂. Has anyone else experienced this or know why it’s happening?