Abnormally long period but some weird symptoms along with it. Please read details.?

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I already made an appt. to see my doctor but I can't get in until Tuesday and I am stressing. I am on day 15 of my period and I have been having this really weird wetness for the past few days. I thought my period soaked through my pants but then when I checked it was just like water. It wasn't the texture of CM, just like water though. I have also been waking up lately to my breasts feeling like they weighed 50 lbs. each, like abnormally heavy and felt odd. Some other info is that I just got off of BC in June and haven't had a period until 2 weeks ago and my doctor thinks I have PCOS. Anybody else have this happen?