First trimester watery discharge

I woke up with quite a bit of watery discharge on my underwear. It looked like I peed myself a bit but I felt it and it definitely was slight discharge feeling not pee. Is this normal? Had sex last night if that makes a difference. I’ve had slight clear discharge but this was quite a bit more than usual. Also is it normal to weigh 2 lbs less than I have the pst 2 weeks? Thanks