Girls, I'm in shock here... I'm 37.5 weeks pregnant, have some watery…

Girls, I'm in shock here... I'm 37.5 weeks pregnant, have some watery discharge, not sure if it's leaking water or maybe urine is coming out, I don't know... I wanted to buy a test for fetal fluid leakage, but there's none in stock at pharmacies, and even some don't know what it is ? And I thought about ordering online, like apteka.ru and all that, but it costs a fortune ? Has anyone bought one before? How much did you pay? Is this a normal price for this test?