Well I once I had strange period that lasted. Over 10 days while on the pill and I went in and they made me go on a higher dose and it went back to normal. I was on orthotrycycline lo and they put me on the regular one, so u might just need to change the pill up I would not worry to much till u talk to your doc make sure your taking your pill at the same time everyday too it is very important good luck
No idea, sorry.
If it get really bothersome for you, maybe go to an urgent care or go and see your primary care doctor. (I am guessing your GYN is out until Monday.)