I know this sounds nasty, but smell the liquid. If there isn't a smell, then I would go to L&D cause it's probably the bag leaking. I went 24 hours before I went in and had to be put on antibiotics during labor. It's better to be safe
If the leaking has been consistent I'd definitely contact your doctor. It could be amniotic fluid. And beginning labor contractions do feel like period cramps.
Is the clear discharge really liquidity? Could be your bag leaking, that's how mine was it didn't bust all at once but leaked a little out a little at a time