period while on bcp

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k guys, i have another question. so, i'm on birth control (Yasmin) and this is my first actual period while taking bcp and i take my fourth placebo pill, well, in right now as it's now 11pm. it started this afternoon and the flow is light but I'm also curious whether this is normal- the blood is fairly bright and it's mucousy. My normal period would be a very heavy flow, very dark in color, a lot of little clots, and the consistency is never mucousy and it never looks like there's mucous involved in the discharge as well. so, pretty much, i'm assuming that this is regular, but i'm also curious as to whether the mucous aspect is something i should be concerned about or whether it's common considering the bcp (or just, you know... not a sign of pregnancy or worse?).

thanks!