If your cervix is closed does that mean it's not possible for you to leak?

Gabriela • First time mom. 23. Due 06.26.17
I always feel like I'm leaking something because I feel a smal gush from time to time. But when I went to my doctor he checked my cervix and also had me get an ultrasound and said everything looked good. 
So is it just urine or is it still possible for me to leak amniotic fluid??
The only thing is that it feels different from normal Discharge it actually feels like leaking.