Leaking Ammniotic Fluid??

I've been on a long car ride, 4 hours without a bathroom break & desperately had to pee. I went to the bathroom and noticed a pretty decent size wet spot on my underwear, but it didn't even really feel wet. It had no odor & I'm 15 weeks & 2 days. I'm really hoping it was just the baby pushing on my bladder and I urinated a bit..