Amniotic fluid or pee? Please help

Hi

I'm only 12w3d pregnant and for a couple of days I have been leaking something down below, I'm not soaked but by end of the day i hav a damp patch, it does have a slight yellow color and sometimes mixed with discharge and (tmi) had a slight smell of urine. Just freaked out because on my first I didn't leak urine until my third trimester and I'm praying I'm only leaking pee and not amniotic fluid! I will be trying to see my doc tomorrow. Just wondering if anyone has any insight?

Thank you