Yes, it sounds like it could be your bag of water to me, too. Personally, I'd avoid swimming and taking a bath (if you REALLY need a bath instead of a shower though, I've heard that cleaning your tub REALLY well with Baking Soda is fine). It's totally fine though to go awhile leaking bag of water. Just be aware of your temperature, you don't want it to rise, because that could be a sign of infection.
Sending you gentle labor vibes!
And... of course there is a chance that it's urine. A friend of mine developed incontinence later in pregnancy when her baby "dropped." If you can smell it to determine it might ease your mind.