Maybe TMI but no picture

Laura • 2 beautiful boys. East Yorkshire England 💚
Me and my partner had intercourse last night, I'm 37+3 today, I went to the toilet and cleaned up afterwards etc etc... But I've woke up and as soon as I stood up ALOT of fluid come out enough to soak my nickers through... Could I be leaking fluid or :/? Sore but I've never lost this much fluid the morning after intercourse before :/