Could be waters, or also could be excess discharge. Putting the pad on to monitor is a good idea and yeah as the previous comment, next thing you could do is call labour triage and see what they say.
I’d definitely ring triage. This was happening to me for 5 weeks and kept getting told I was wetting myself cause my pad wasn’t wet. I had a slow rupture. Don’t want to scare you. But definitely best to get it checked
I'd say so, they can do a swab to check if your waters are leaking