Sweet smelling urine or fluid?

Im going into my 20th week of pregnancy. I go in today for my Glucose test. The last 24 hours after using the rest room I've noticed a very sweet smell. It doesn't feel like a UTI but I'm hoping it is. My absolute fear is its amniotic fluid leaking. That can also have a sweet smell from what I've been told. I called my Perinatologist and I'm hoping to hear from him soon. I'm antsy and getting worried.