Urine or amniotic fluid leak?

I have been coughing very hard and badly since one week ago. Im on antibiotics and cough syrup ease my symptoms. However i realised I have been leaking out something when i cough too hard. Im not sure is it my amniotic fluid or urine. I can't differentiate neither #firsttimemom #advicepls because my pee is almost clear color (drank too much water) Im quite worried as it has been ongoing since day one. I'm currently 18weeks pregnant and hoping to hear from some mommies with same experience. #FTM #firstbaby