36 week leaking fluid and measuring small..

Shiara • Im an 18 year old FTM, engaged to the love of my life, the beautiful man who gave me my perfect little son 😍 15/18/16💙
So ive been leaking fluids for a little while now. But the doctor said my water is still intact.
Also, at my 35week midwife Appointment, my belly measured at 34.5 so they werent worried because it was close. But at my 36 appointment, i measured at 34... I went down.. My belly isnt firm anymore so you can feel EXACTLY how hes laying..
She seems worried and is sending us for an ultrasound to measure fluids.. My appointments tomorrow so im just wondering, if i am leaking.. What will they do??