32 weeks and always wet

My underwear is alway soaked and I can feel stuff coming out its watery and has no smell usually. I've had this problem most of my pregnancy I'm so scared all the time that it's amniotic fluid I've been in a couple of times a couple of months ago to get a swab test it was neg. what could it be it's constantly coming out. But it's not running down my leg or anything like that. Anyone have this problem?