Leaking fluid?

I keep finding wet spots in my underwear, just wet not mucus. I only have a little bit of cm and it's white/creamy. This wet spot has a very strong odor, smells salty. It's not much but has happened 3 times in the last 30 hours. I feel a little silly asking my midwife about it since this is my 3rd pregnancy. But I've never had it happen b4. I'm 34 wks 5 days. Has anybody else had this happen? Could it be amniotic fluid? Is it a big deal if it is amniotic fluid?