Panties always wet

AG
Hi girls, I am 15w3d today and have seen my baby at 12 weeks. Of late, my panties are always wet (within 3-4hrs of changing) and I developed a rash on the thighs ( possibly because of them). Is this leakage normal? I am peeing constantly too. I googled and after looking at some sites, I'm afraid that I am leaking some fluid.Will definitely bring this up with my doc but I am meeting her only next Thursday. Asking this question here to get some peace of mind.