Leaking?

It's a lot hotter now that it is summer time (Yay for summer pregnancies). I am 26 weeks pregnant and I am noticing I have to change my underwear twice a day because I get extremely wet down there. It's even soaking through my pants (you can't see it but I can feel it). I was mostly just attributing it to sweat, but this morning I was laying in bed and I felt some fluid come out (very small amount, she wasn't kicking or anywhere near my bladder). I have an appointment for tomorrow but I am wondering if I should go in today. Thoughts?

(Baby has been kicking and extremely active but my weight gain is still <10 lbs, not sure if that matters)