Wet spot in underwear ?

I felt wet in my underwear, I looked there’s a noticeable big wet mark in them but had some tinge of white discharge but not a lot of discharge. Mostly just wetness.

I can’t tell if it has a colour cuz my underwear is black. Most of it is wet lol. Is this normal? I’m 32 weeks. Has a slight smell, but it’s not urine.