possible leak??

So I was at the gym, and at the end of my workout, I went on the treadmill to get my cardio in. A couple minutes in to my warm up, a quick paced walk, I suddenly felt a small gush. I immediately went to the bathroom, and nothing else happened...there was no discharge or any more fluid. Since then, I am cramping..but not painfully...and I still feel kind of wet, but I'm not having enough to fill a pad or anything. I've never experienced this before, even though this is my fourth pregnancy. I'm not sure whether this could be my waters leaking, or what it could possibly be! Is this something I should just wait out at home and see if anything progresses, or do you all think I should just head in? I have three kids at home, so I'd like to stay at home as long as possible!